Sword of Waste and Wear3
Artifact - Equipment (R)
Equip 2
Equipped creature gets +2/+2 and has deathtouch and haste.
Whenever equipped creature deals combat damage to a player, that player discards a card and you may destroy target artifact that player controls.
Kathar the Spirit Reaper2
Legendary artifact - Equipment (M) Imprint - Whenever equipped creature deals combat damage to a creature, exile that creature imprinted on Kathar.
Equip 3
Equipped creature gets +2/+2 and has all abilities of permanent cards imprinted on Kathar.
Plunder1RR
Sorcery (R)
Until end of turn, whenever a creature you control deals combat damage to an opponent, gain control of an artifact that player controls.
Counter AlignmentU
Instant (u)
As an additional casts to cast !, reveal another card from your hand.
Counter target spell if it has the same converted mana costs of the revealed card.
"Coincidence to lesser folk."
Ritual Exhange1B
Sorcery (u)
Target player sacrifices a creature, then loses life equal to that creature's power. If that player does, he or she may return a creature with a different name from his or her graveyard to the battlefield.
"Standard practice"
Counter ProposalU
Instant (U)
Counter target spell. That spell's controller may search his or her library for a land card, put it onto the battlefield tapped, then shuffle his or her library.
"During a negotiation, what goes unstated is often the only thing worth paying attention to."
Mama Bear is quite epic. Ursa Matriarch maybe? Barbearian is pretty right. Bear Warrior creature types maybe? Honeyseeker is a nice variation of Spike Cannibal. Brainseeker - I'd prefer it as a bear specter...
That's quie a lot of text, can't you just use Arena text?
"Target creature you control and target creature of an opponent's choice he or she controls fight each otherr."?
Aggravation Wave1U
Instant (R)
Counter target spell you don't control. That spell's controller creates an emblem with "Creatures you control get +1/+0."
Aggressive ResearcherBU
Creature - Merfolk Vampire Wizard (R)
Menace
Whenever ~ or another a creature you control with Menace is blocked, draw a card for each creature blocking it.
--Thirst for knowledge meets thirst for blood.--
2/1
Goblin Box3
Artifact (R)
Discard a card, T: Create a 2/2 red goblin wizard creature token with "When this creature enters the battlefield, name a card. Permanents with the chosen name cannot use non-mana abilities."
"Look at me! I'm a wizard!"
- Bram Bumbsnatcher
Graveshift1B
Instant (U)
Sacrifice a creature, then, if you did, you may return a creature card in your graveyard with a different name and mana cost less than or equal to that of the sacrificed creature to the battlefield.
Cycling - B
Gelur's Bargain1BB
Legendary enchantment (M)
When your life total drops below 1, create a legendary 2/2 black zombie wizard creature token with your name and "You cannot lose the game," and "When this creature leaves the battlefield, you lose the game."
Sword of Waste and Wear 3
Artifact - Equipment (R)
Equip 2
Equipped creature gets +2/+2 and has deathtouch and haste.
Whenever equipped creature deals combat damage to a player, that player discards a card and you may destroy target artifact that player controls.
Kathar the Spirit Reaper 2
Legendary artifact - Equipment (M)
Imprint - Whenever equipped creature deals combat damage to a creature, exile that creature imprinted on Kathar.
Equip 3
Equipped creature gets +2/+2 and has all abilities of permanent cards imprinted on Kathar.
Plunder 1RR
Sorcery (R)
Until end of turn, whenever a creature you control deals combat damage to an opponent, gain control of an artifact that player controls.
Odd ball 3
Artifact (M)
Prevent all even combat damage.
Discard a card: Put a +1/+1 counter on target creature. And player may play this ability.
Scurvy B
Sorcery (U)
Destroy all pirates.
"Argh!"
Counter Alignment U
Instant (u)
As an additional casts to cast !, reveal another card from your hand.
Counter target spell if it has the same converted mana costs of the revealed card.
"Coincidence to lesser folk."
Ritual Exhange 1B
Sorcery (u)
Target player sacrifices a creature, then loses life equal to that creature's power. If that player does, he or she may return a creature with a different name from his or her graveyard to the battlefield.
"Standard practice"
Counter Proposal U
Instant (U)
Counter target spell. That spell's controller may search his or her library for a land card, put it onto the battlefield tapped, then shuffle his or her library.
"During a negotiation, what goes unstated is often the only thing worth paying attention to."
Barbearian is pretty right. Bear Warrior creature types maybe?
Honeyseeker is a nice variation of Spike Cannibal.
Brainseeker - I'd prefer it as a bear specter...
"Target creature you control and target creature of an opponent's choice he or she controls fight each otherr."?
In any case, more Arenas are welcome!
Aggravation Wave 1U
Instant (R)
Counter target spell you don't control. That spell's controller creates an emblem with "Creatures you control get +1/+0."
Aggressive Researcher BU
Creature - Merfolk Vampire Wizard (R)
Menace
Whenever ~ or another a creature you control with Menace is blocked, draw a card for each creature blocking it.
--Thirst for knowledge meets thirst for blood.--
2/1
Goblin Box 3
Artifact (R)
Discard a card, T: Create a 2/2 red goblin wizard creature token with "When this creature enters the battlefield, name a card. Permanents with the chosen name cannot use non-mana abilities."
"Look at me! I'm a wizard!"
- Bram Bumbsnatcher
Graveshift 1B
Instant (U)
Sacrifice a creature, then, if you did, you may return a creature card in your graveyard with a different name and mana cost less than or equal to that of the sacrificed creature to the battlefield.
Cycling - B
Gelur's Bargain 1BB
Legendary enchantment (M)
When your life total drops below 1, create a legendary 2/2 black zombie wizard creature token with your name and "You cannot lose the game," and "When this creature leaves the battlefield, you lose the game."