
Imposing Sovereign | Creature | Human Noble | Creatures your opponents control enter the battlefield tapped. | Scott M. Fischer

Tidebinder Mage | Creature | Merfolk Wizard | When Tidebinder Mage enters the battlefield, tap target red or green creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Tidebinder Mage. | John Severin Brassell

Goblin Diplomats | Creature | Goblin | {T}: Each creature attacks this turn if able. | Izzy

Scavenging Ooze | Creature | Ooze | {G}: Exile target card from a graveyard. If it was a creature card, put a +1/+1 counter on Scavenging Ooze and you gain 1 life. | Austin Hsu

Vastwood Hydra | Creature | Hydra | Vastwood Hydra enters the battlefield with X +1/+1 counters on it.
When Vastwood Hydra dies, you may distribute a number of +1/+1 counters equal to the number of +1/+1 counters on Vastwood Hydra among any number of creatures you control. | Slawomir Maniak