Clone | Creature | Shapeshifter | You may have Clone enter the battlefield as a copy of any creature on the battlefield. | Kev Walker
Colossal Whale | Creature | Whale | Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
Whenever Colossal Whale attacks, you may exile target creature defending player controls until Colossal Whale leaves the battlefield. (That creature returns under its owner's control.) | Adam Paquette
Elite Arcanist | Creature | Human Wizard | When Elite Arcanist enters the battlefield, you may exile an instant card from your hand.
{X}, {T}: Copy the exiled card. You may cast the copy without paying its mana cost. X is the mana value of the exiled card. | James Zapata
Galerider Sliver | Creature | Sliver | Sliver creatures you control have flying. | James Zapata
Jace's Mindseeker | Creature | Fish Illusion | Flying
When Jace's Mindseeker enters the battlefield, target opponent mills five cards. You may cast an instant or sorcery spell from among them without paying its mana cost. | Greg Staples
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