Ethereal Transmutator 3UU
Creature - Illusion R
When Ethereal Transmutator attacks, all creatures you control become copy of target creature you control until at end of turn.
3/4
Iridescent Christal 0
Artifact C 1, T: Add one mana of any color.
Unleashed Predator 2RR
Creature - Hellion U
When Unleashed Predator enters the battlefield, draw two cards, then discard two cards.
4/4
Walking Dream 1U
Creature - Illusion U
When Walking Dream enters the battlefield, target nonland permanent becomes lost and put two deep counters on it. (Lost permanents can’t attack, block, activate or trigger abilities unless their controller pays 1, for each deep counter on it.)
When Walking Dream dies, remove two deep counters from target permanent an opponent controls.
2/2
Mist of Dreams U
Enchantment R
When Mist of Dreams enters the battlefield, target nonland permanent becomes lost. Put a lost counter on that permanent. (A lost permanent can’t attack, block, put its abilities into the stack unless its controller pays 1 for each deep counter on it.)
Whenever a lost permanent attacks, blocks or puts its abilities into the stack, put a deep counter on it.
Magma Blast XR
Sorcery U
Magma Blast deals 2 damage to up to one target creature.
Magma Blast Deals X damage to up to one target player.
Twin-Sword Duelist WW
Creature - Dwardf Soldier C
Vigilance
3/2
Unstoppable Excavator G
Creature – Mole U
When Unstoppable Excavator enters the battlefield, search your library for a basic land card, reveal it, shuffle your library and put the card on top of it.
2/1
Amteris, Pioner´s Guardian 1WW
Legendary Planeaswalker - Amteris M
+2: Put a deep counter on target nonland permanent. It becomes lost.
-X: Exite target permanent of converted mana cost X or less.
-7: Destroy all creatures.
4
Husem, Illution Locus 3UU
Planeswalker - Orel M
+1: Create a 4/4 blue Illusion creature token with flying and "When this creature deals damage, sacrifice it.
-3: Choose a permanent type. Permanents of the chosen type that control you opponents don't untap during their controller's next untap steep.
-8: Gain control of four target permanents.
5
Net Nest G
Enchantment R
When Net Nest enters the battlefield, you may sacrifice it. If you do, put a land card from your hand onto the battlefield tapped and gain 2 life.
Whenever a nonbasic land enters the battlefield under an opponent control, Put a land card from your hand onto he battlefield tapped.
Hardened Markis 1RR
Creature - Dwarf Knight R
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
When you cast Hardened Marquis or at the beginning of your upkeep, you may tap target conquered land, it doesn't untap during its controller's next untap steep. If you do, Hardened Marquis deals 2 damage to you.
4/3
Mine the World 2R
Enchantment U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Conquered lands your oppoenents control are Mountains.
Foredwarf 1R
Creature - Dwarf Soldier U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
At the beginning of your upkeep, gain control of target creature with power not greater than Foredwarf if an opponent control a conquered land that is tapped.
2/1
Underworld Echoes U
Enchantment U
Sacrifice Underworld Echoes: Copy target activated or triggered ability. Choose new targets for the copies.
Letargic Echoes 1UU
Instant C
Target player puts the top five cards from their library into their graveyard. For each land card put there this way, all creatures get -1/-0 until at edn of turn.
Archives Looting U
Sorcery R
An opponent puts the top three cards from their library into their graveyard. For each land card put there this way, you draw a card.
Inaccessible Find 1W
Sorcery C
Gain 3 life. Up to one target creature becomes lost and put three lost counters on it. (Lost permanents can’t attack, block, activate or trigger abilities unless their controller pays 1, for each deep counter on it.)
Archive Sinking 1U
Sorcery C
Target player puts the top four cards from his or her library.
Search your library for up to three cards named Archive Sinking, reaveal the and put them into your hand. Shuffle you library.
Devil's Mockery 2B
Enchantment U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
When you cast Devil's Mockery, target creature gets -3/-3 until at end of turn.
As long as a conquered land an opponent contols is tapped, Devil's Mockery becomes a 2/2 red Devil creture.
Illusionary Pupetter 1UU
Creature - Illusion C
Hexproof T: Tap or untap target creature.
0/1
Demonic Antorchist 1BR
Creature - Devil Warrior U
Lifelink RB: Demonic Antorchist deals 1 damage to any target.
3/3
Evil Adviser 1B
Creature - Devil U
When Evil Adviser enters the battlefield, a player reveals their hand. Choose a creature card from there and exile it until Evil Adviser leaves the battlefield. You may cast that card for as long as it remains exiled. Spend mana as though it were mana of any type to cast that spell.
0/3
Despotic Tutor 1B
Enchantment U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Search your library for a card, then shuffle your library and put that card second from the top.
When an opponent taps a conquered land, exile Despotic Tutor. If you do, draw a card.
Demon Bloodrinker 1B
Creature - Devil Warrior R
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
At the beginning of your upkeep, lose 2 life unless an opponent controls a conkered land that is tapped.
4/3
Urot, Cursecaster 3B
Legendary Creature - Demon R
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Flying
Whenever a land an opponent controls becomes tapped, that player sacrifices a creature. Trigger this ability only once each turn.
3/4
Urot's Inquisition 2B
Enchantment U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
At the beginning of your upkeep, each opponent who controls a conkered land discards a card.
Inspiring Captain 1W
Creature - Dwarf Soldier U
Whenever Inspiring Captain attacks, the next spell you cast cost W less to cast.
2/1
Wall of Gems 1G
Creature - Elemental Wall C
When Wall of Gems enters the battlefeild, put two deep counters on traget permanent or exiled card.
0/4
Stone of Silence 7
Artifact R
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
When Stone of Silence enters the battlefield, choose a number.
Spells with converted mana cost equal to that number can's be casted.
Hypnotic Illusion 3U
Creature - Illusion R
Flash
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
You may do Hypnotic Illusion enters the battlefield tapped. If you do, exile target instant or sorcery card from your graveyrad. You may cast it that card from exile this turn.
3/2
Hyashar, Overlord's Hier 6URG
Legendary Creature - Dragon M
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
Trample, flying
When Hyashar enters the battlefield or at the beginning of your upkeep, look at the top card of your library, then you may exile it with three deep counters on it, it gains inter. You can´t cast land cards exiled this way.
9/9
Armulun's Awakening 3G
Sorcery U
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
All lands you control become 2/2 creatures until end of turn. They’re still lands.
Infinite Tunnel
Land U T: Add 1. T: Add 2. You can't cast spells for the rest of this turn.
Overwhelming Tremor 2R
Sorcery C
Opponent creatures can't block this turn.
Advent the Hellion 4RR
Sorcery U
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
Target player sacrifices two lands.
Soldier of Mortars 1R
Creature - Dwarf Soldier C
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
When Soldier of Mortars dies, it deals 2 damage to any target if an opponent controls a tapped land that is conquered.
2/2
Tunnel Chanter 1U
Creature - Illusion U
Sacrifice Tunnel Chanter: The next instant or sorcery card that yuo cast this turn costs 1U less to cast.
2/1
Tunnel's Suction 2U
Instant C
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
Return target permanent to its owner´s hand.
Awaken Hellkite 5R
Creature - Hellion C
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
When Awaken Hellkite enters the battlefield, creatures you control get +2/+0 until at end of turn.
4/4
Ancient Sword 2
Artifact C
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
Equip 1
Equipped creature gets +1/+2.
Corporeal Transmutation 1U
Enchantment U
Sacrifice Corporeal Transmutation: The next nonland permanent that enters the battlefield this turn, it does as lost and with four deep counters on it. (Lost permanents can’t attack, block, activate or trigger abilities unless their controller pays X, where X is equal to the number of deep counters on it.)
Ranger's Loss 2U
Enchantment R
Your opponents skip their draw steep. 1: Players can't skip phases this turn. Any player may activate this ability.
Conkeror's Stronghold
Land U
When Conkeror's Stronghold enters the battlefield, put a conquer counter on an opponent land, it becomes conquered by you. T: Add 1. T: Add one mana of any color. Activate this ability only if there's a tapped land conquered by you.
Luminous Armor 2W
Enchantment - Aura C
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Enchant Creature
Enchanted creature gets +0/+4. If there's a tapped land captured by you, enchanted creature gets +4/+4 instead.
Seasonal Mole G
Creature - Mole R
Sacrifice an enchantment: Return Seasonal Mole from your graveyard to the battlefield.
Counter an enchantment spell you control: Return Seasonal Mole from your graveyard to the battlefield.
Seasonal Mole gets +1/+1 for each enchantment card into your graveyard.
1/1
Forced Tribute R
Sorcery U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Forced Tribute deals 1 damage to target player equal to the conkered lands by you. Tap those lands. They don't untap suring their next controller's untap steep.
Illusory World 2UU
Enchantment R
Whenever a nonland permanent an opponent controls becomes target of a spell or ability, its controller sacrifices it.
When I start a set I don't feel the need of making a compendium of the cards, but I have posted to many. So since a recived your councel I made a file with all the cards. I have created 76 cards for this set. Depending of how large I want The Core, I'm between the 30-50%.
It is good to have advise of somebody with deep knowlege the magic rules, I´ll correct the mechanic of lost.
I have some issues with the suggestions for conquer. Meanwhile it would have flavor as you suggested, it would be hard to reach the Reign Supreme.
Reshape might seem uninteresting but It can be powerful combined with effects that enlarge creatures. For example:
Assassin of Shadows BB
Creature – Shade Assassin U
Reshape – Put a -1/-1 counter on this: Target opponent sacrifices a creature If it’s your turn.
3/1
If you are able to enlarge this creature you will decimate opponent creatures.
Also, it would be possible to reduce the cost you're paying for reshape:
Dark Dweller BB
Creature - Shade U
Creatures you control get +1/+0 for each counter on them.
Reshape – Put a -1/-1 counter on this: Target Creature gains first strike and gets +1/+0 until at end of turn.
2/3
Finally, It's true that I have troubles with blue, I will try to create some small illusions to compensate the lack of blue small creatures.
Ethereal Transmutator 3UU
Creature - Illusion R
When Ethereal Transmutator attacks, all creatures you control become copy of target creature you control until at end of turn.
3/4
Iridescent Christal 0
Artifact C
1, T: Add one mana of any color.
Unleashed Predator 2RR
Creature - Hellion U
When Unleashed Predator enters the battlefield, draw two cards, then discard two cards.
4/4
Walking Dream 1U
Creature - Illusion U
When Walking Dream enters the battlefield, target nonland permanent becomes lost and put two deep counters on it. (Lost permanents can’t attack, block, activate or trigger abilities unless their controller pays 1, for each deep counter on it.)
When Walking Dream dies, remove two deep counters from target permanent an opponent controls.
2/2
Enchantment R
When Mist of Dreams enters the battlefield, target nonland permanent becomes lost. Put a lost counter on that permanent. (A lost permanent can’t attack, block, put its abilities into the stack unless its controller pays 1 for each deep counter on it.)
Whenever a lost permanent attacks, blocks or puts its abilities into the stack, put a deep counter on it.
Magma Blast XR
Sorcery U
Magma Blast deals 2 damage to up to one target creature.
Magma Blast Deals X damage to up to one target player.
Twin-Sword Duelist WW
Creature - Dwardf Soldier C
Vigilance
3/2
Creature – Mole U
When Unstoppable Excavator enters the battlefield, search your library for a basic land card, reveal it, shuffle your library and put the card on top of it.
2/1
Amteris, Pioner´s Guardian 1WW
Legendary Planeaswalker - Amteris M
+2: Put a deep counter on target nonland permanent. It becomes lost.
-X: Exite target permanent of converted mana cost X or less.
-7: Destroy all creatures.
4
Husem, Illution Locus 3UU
Planeswalker - Orel M
+1: Create a 4/4 blue Illusion creature token with flying and "When this creature deals damage, sacrifice it.
-3: Choose a permanent type. Permanents of the chosen type that control you opponents don't untap during their controller's next untap steep.
-8: Gain control of four target permanents.
5
Net Nest G
Enchantment R
When Net Nest enters the battlefield, you may sacrifice it. If you do, put a land card from your hand onto the battlefield tapped and gain 2 life.
Whenever a nonbasic land enters the battlefield under an opponent control, Put a land card from your hand onto he battlefield tapped.
Hardened Markis 1RR
Creature - Dwarf Knight R
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
When you cast Hardened Marquis or at the beginning of your upkeep, you may tap target conquered land, it doesn't untap during its controller's next untap steep. If you do, Hardened Marquis deals 2 damage to you.
4/3
Enchantment U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Conquered lands your oppoenents control are Mountains.
Foredwarf 1R
Creature - Dwarf Soldier U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
At the beginning of your upkeep, gain control of target creature with power not greater than Foredwarf if an opponent control a conquered land that is tapped.
2/1
Underworld Echoes U
Enchantment U
Sacrifice Underworld Echoes: Copy target activated or triggered ability. Choose new targets for the copies.
Instant C
Target player puts the top five cards from their library into their graveyard. For each land card put there this way, all creatures get -1/-0 until at edn of turn.
Archives Looting U
Sorcery R
An opponent puts the top three cards from their library into their graveyard. For each land card put there this way, you draw a card.
Inaccessible Find 1W
Sorcery C
Gain 3 life. Up to one target creature becomes lost and put three lost counters on it. (Lost permanents can’t attack, block, activate or trigger abilities unless their controller pays 1, for each deep counter on it.)
Sorcery C
Target player puts the top four cards from his or her library.
Search your library for up to three cards named Archive Sinking, reaveal the and put them into your hand. Shuffle you library.
Devil's Mockery 2B
Enchantment U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
When you cast Devil's Mockery, target creature gets -3/-3 until at end of turn.
As long as a conquered land an opponent contols is tapped, Devil's Mockery becomes a 2/2 red Devil creture.
Illusionary Pupetter 1UU
Creature - Illusion C
Hexproof
T: Tap or untap target creature.
0/1
Creature - Devil Warrior U
Lifelink
RB: Demonic Antorchist deals 1 damage to any target.
3/3
Evil Adviser 1B
Creature - Devil U
When Evil Adviser enters the battlefield, a player reveals their hand. Choose a creature card from there and exile it until Evil Adviser leaves the battlefield. You may cast that card for as long as it remains exiled. Spend mana as though it were mana of any type to cast that spell.
0/3
Despotic Tutor 1B
Enchantment U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Search your library for a card, then shuffle your library and put that card second from the top.
When an opponent taps a conquered land, exile Despotic Tutor. If you do, draw a card.
Creature - Devil Warrior R
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
At the beginning of your upkeep, lose 2 life unless an opponent controls a conkered land that is tapped.
4/3
Urot, Cursecaster 3B
Legendary Creature - Demon R
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Flying
Whenever a land an opponent controls becomes tapped, that player sacrifices a creature. Trigger this ability only once each turn.
3/4
Urot's Inquisition 2B
Enchantment U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
At the beginning of your upkeep, each opponent who controls a conkered land discards a card.
Inspiring Captain 1W
Creature - Dwarf Soldier U
Whenever Inspiring Captain attacks, the next spell you cast cost W less to cast.
2/1
Creature - Elemental Wall C
When Wall of Gems enters the battlefeild, put two deep counters on traget permanent or exiled card.
0/4
Stone of Silence 7
Artifact R
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
When Stone of Silence enters the battlefield, choose a number.
Spells with converted mana cost equal to that number can's be casted.
Hypnotic Illusion 3U
Creature - Illusion R
Flash
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
You may do Hypnotic Illusion enters the battlefield tapped. If you do, exile target instant or sorcery card from your graveyrad. You may cast it that card from exile this turn.
3/2
Hyashar, Overlord's Hier 6URG
Legendary Creature - Dragon M
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
Trample, flying
When Hyashar enters the battlefield or at the beginning of your upkeep, look at the top card of your library, then you may exile it with three deep counters on it, it gains inter. You can´t cast land cards exiled this way.
9/9
Sorcery U
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
All lands you control become 2/2 creatures until end of turn. They’re still lands.
Infinite Tunnel
Land U
T: Add 1.
T: Add 2. You can't cast spells for the rest of this turn.
Overwhelming Tremor 2R
Sorcery C
Opponent creatures can't block this turn.
Sorcery U
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
Target player sacrifices two lands.
Soldier of Mortars 1R
Creature - Dwarf Soldier C
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
When Soldier of Mortars dies, it deals 2 damage to any target if an opponent controls a tapped land that is conquered.
2/2
Tunnel Chanter 1U
Creature - Illusion U
Sacrifice Tunnel Chanter: The next instant or sorcery card that yuo cast this turn costs 1U less to cast.
2/1
Instant C
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
Return target permanent to its owner´s hand.
Awaken Hellkite 5R
Creature - Hellion C
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
When Awaken Hellkite enters the battlefield, creatures you control get +2/+0 until at end of turn.
4/4
Ancient Sword 2
Artifact C
Inter (X: Exile this face down with X deep counters on it. You can cast for 1 less to cast it for each deep counter on it.)
Equip 1
Equipped creature gets +1/+2.
Enchantment U
Sacrifice Corporeal Transmutation: The next nonland permanent that enters the battlefield this turn, it does as lost and with four deep counters on it. (Lost permanents can’t attack, block, activate or trigger abilities unless their controller pays X, where X is equal to the number of deep counters on it.)
Ranger's Loss 2U
Enchantment R
Your opponents skip their draw steep.
1: Players can't skip phases this turn. Any player may activate this ability.
Conkeror's Stronghold
Land U
When Conkeror's Stronghold enters the battlefield, put a conquer counter on an opponent land, it becomes conquered by you.
T: Add 1.
T: Add one mana of any color. Activate this ability only if there's a tapped land conquered by you.
Enchantment - Aura C
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Enchant Creature
Enchanted creature gets +0/+4. If there's a tapped land captured by you, enchanted creature gets +4/+4 instead.
Seasonal Mole G
Creature - Mole R
Sacrifice an enchantment: Return Seasonal Mole from your graveyard to the battlefield.
Counter an enchantment spell you control: Return Seasonal Mole from your graveyard to the battlefield.
Seasonal Mole gets +1/+1 for each enchantment card into your graveyard.
1/1
Forced Tribute R
Sorcery U
Conqueror (When you cast this, put a conquer counter on an opponent land, it becomes conquered by you.)
Forced Tribute deals 1 damage to target player equal to the conkered lands by you. Tap those lands. They don't untap suring their next controller's untap steep.
Illusory World 2UU
Enchantment R
Whenever a nonland permanent an opponent controls becomes target of a spell or ability, its controller sacrifices it.
When I start a set I don't feel the need of making a compendium of the cards, but I have posted to many. So since a recived your councel I made a file with all the cards. I have created 76 cards for this set. Depending of how large I want The Core, I'm between the 30-50%.
It is good to have advise of somebody with deep knowlege the magic rules, I´ll correct the mechanic of lost.
I have some issues with the suggestions for conquer. Meanwhile it would have flavor as you suggested, it would be hard to reach the Reign Supreme.
Reshape might seem uninteresting but It can be powerful combined with effects that enlarge creatures. For example:
Assassin of Shadows BB
Creature – Shade Assassin U
Reshape – Put a -1/-1 counter on this: Target opponent sacrifices a creature If it’s your turn.
3/1
If you are able to enlarge this creature you will decimate opponent creatures.
Also, it would be possible to reduce the cost you're paying for reshape:
Dark Dweller BB
Creature - Shade U
Creatures you control get +1/+0 for each counter on them.
Reshape – Put a -1/-1 counter on this: Target Creature gains first strike and gets +1/+0 until at end of turn.
2/3
Finally, It's true that I have troubles with blue, I will try to create some small illusions to compensate the lack of blue small creatures.