Tolo, the Sleep-bringer2UU
Legendary Creature - Homunculus
At the beginning of each player's upkeep, put a sleep counter on Tolo, the Sleep-bringer.
Creatures get -X/-0 where X is the number of sleep counters on Tolo.
If a creature's power would increase, it stays the same instead.
0/6
I like that one, but it's kind of fuzzy in the rules. Not sure how they'd actually implement it. (Granted it's been a while since I've really read them.)
Memory Mixer2UU
Artifact Creature - Human Wizard 1U, T: Select half the cards in your graveyard at random and shuffle those cards into your library.
2/4
I laughed when hundred-handed ones were lumped together with the non-original-myth ones.
Trúa, the First Guardian1RW
Legendary Creature - Warrior R
Defender, first strike
Trúa, the First Guardian can block an additional two creatures each combat. "The Jotun are a mighty foe to those in Midgard, it is true, but don't worry, children, for any who wish to threaten us must first face Trúa, who is mightier by far."
-Móðir Fjalltindr
5/2
IIW: Lands which directly interact with win conditions, two examples would be (1) introducing new win conditions or (2) making it so that certain players can't win or lose.
Wurm of Filigree2WUB
Artifact Creature - Wurm
Trample
Whenever Wurm of Filigree deals combat damage to an opponent, you may return target artifact card in a graveyard to the battlefield under your control.
4/4
Just noticed that my design is almost exactly the same as mirrodin71's design. I'm going to chalk that up to great minds thinking alike and change mine, since they posted first.
Tried(B/R)(B/R)
Instant M
Until end of turn, if a spell or ability would cause an opponent to gain life, that player loses that much life instead.
////// TrueGWU
Instant M
Each player draws cards until they have seven cards in their hand and gains life equal to the number of cards they drew this turn.
//////
Fuse (You may cast one or both halves of this card from your hand.)
Somnambulism1UR
Enchantment - Aura R
Enchant creature
If enchanted creature would untap, it's controller flips a coin instead. If they lose the flip, choose one of their opponents at random. That opponent gains control of enchanted creature. Otherwise untap enchanted creature.
IIW: Lands which directly interact with win conditions, two examples would be (1) introducing new win conditions or (2) making it so that certain players can't win or lose.
Pendulum of Foretelling2
Artifact T: Exile the top card of your libary. T, Put a card from your hand on the bottom of your library: Put a card exiled with Pendulum of Foretelling into your hand.
The Ancient Juyko2GW
Legendary Creature - Antelope T: Add GG, GW, or WW. 1B, Sacrifice The Ancient Juyko: Distribute five -1/-1 counters among any number of target creatures.
3/3
Cowardly Sky-GuardianUB
Creature - Faerie Knight
Defender, flying
Cowardly Sky-Guardian can't block creatures with power 3 or greater. "You will never lose a fight, so long as you pick the right ones."
3/3
Erase the Defense3BR
Instant
Exile each blocking creature. For each creature creature exiled this way, search its controller's graveyard, hand, and library for all cards with the same name as that creature and exile them. Then each player shuffles his or her library.
Tolo, the Sleep-bringer 2UU
Legendary Creature - Homunculus
At the beginning of each player's upkeep, put a sleep counter on Tolo, the Sleep-bringer.
Creatures get -X/-0 where X is the number of sleep counters on Tolo.
If a creature's power would increase, it stays the same instead.
0/6
Bound Techpriest + Traumatize
Memory Mixer 2UU
Artifact Creature - Human Wizard
1U, T: Select half the cards in your graveyard at random and shuffle those cards into your library.
2/4
Trúa, the First Guardian 1RW
Legendary Creature - Warrior R
Defender, first strike
Trúa, the First Guardian can block an additional two creatures each combat.
"The Jotun are a mighty foe to those in Midgard, it is true, but don't worry, children, for any who wish to threaten us must first face Trúa, who is mightier by far."
-Móðir Fjalltindr
5/2
IIW: Lands which directly interact with win conditions, two examples would be (1) introducing new win conditions or (2) making it so that certain players can't win or lose.
Wurm of Filigree 2WUB
Artifact Creature - Wurm
Trample
Whenever Wurm of Filigree deals combat damage to an opponent, you may return target artifact card in a graveyard to the battlefield under your control.
4/4
Instant M
Until end of turn, if a spell or ability would cause an opponent to gain life, that player loses that much life instead.
//////
True GWU
Instant M
Each player draws cards until they have seven cards in their hand and gains life equal to the number of cards they drew this turn.
//////
Fuse (You may cast one or both halves of this card from your hand.)
Enchantment - Aura R
Enchant creature
If enchanted creature would untap, it's controller flips a coin instead. If they lose the flip, choose one of their opponents at random. That opponent gains control of enchanted creature. Otherwise untap enchanted creature.
IIW: Lands which directly interact with win conditions, two examples would be (1) introducing new win conditions or (2) making it so that certain players can't win or lose.
Pendulum of Foretelling 2
Artifact
T: Exile the top card of your libary.
T, Put a card from your hand on the bottom of your library: Put a card exiled with Pendulum of Foretelling into your hand.
The Ancient Juyko 2GW
Legendary Creature - Antelope
T: Add GG, GW, or WW.
1B, Sacrifice The Ancient Juyko: Distribute five -1/-1 counters among any number of target creatures.
3/3
Tar-Feather Phoenix 4R
Creature - Phoenix
Flying
When Tar-Feather Phoenix dies, choose one —
Soul Flush 4URG
Instant
As an additional cost to cast Soul Flush, return all creatures you control to their owner's hands.
Choose one —
Cowardly Sky-Guardian UB
Creature - Faerie Knight
Defender, flying
Cowardly Sky-Guardian can't block creatures with power 3 or greater.
"You will never lose a fight, so long as you pick the right ones."
3/3
Erase the Defense 3BR
Instant
Exile each blocking creature. For each creature creature exiled this way, search its controller's graveyard, hand, and library for all cards with the same name as that creature and exile them. Then each player shuffles his or her library.