
Constricting Sliver | Creature | Sliver | Sliver creatures you control have "When this creature enters the battlefield, you may exile target creature an opponent controls until this creature leaves the battlefield." | Karl Kopinski

Kapsho Kitefins | Creature | Fish | Flying
Whenever Kapsho Kitefins or another creature enters the battlefield under your control, tap target creature an opponent controls. | Ryan Yee

Caustic Tar | Enchantment | Aura | Enchant land
Enchanted land has "{T}: Target player loses 3 life." | Jung Park

Endless Obedience | Sorcery | | Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Put target creature card from a graveyard onto the battlefield under your control. | Karl Kopinski

Might Makes Right | Enchantment | | At the beginning of combat on your turn, if you control each creature on the battlefield with the greatest power, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn. (It can attack and {T} this turn.) | Mark Winters

Ancient Silverback | Creature | Ape | {G}: Regenerate Ancient Silverback. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.) | Scott M. Fischer