Battering Krasis | Creature | Shark Beast | Trample
Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.) | Jack Wang
Renegade Krasis | Creature | Beast Mutant | Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)
Whenever Renegade Krasis evolves, put a +1/+1 counter on each other creature you control with a +1/+1 counter on it. | Howard Lyon
Beetleform Mage | Creature | Human Insect Wizard | {G}{U}: Beetleform Mage gets +2/+2 and gains flying until end of turn. Activate only once each turn. | Marco Nelor
Vorel of the Hull Clade | Legendary Creature | Human Merfolk | {G}{U}, {T}: Double the number of each kind of counter on target artifact, creature, or land. | Mike Bierek
Varolz, the Scar-Striped | Legendary Creature | Troll Warrior | Each creature card in your graveyard has scavenge. The scavenge cost is equal to its mana cost. (Exile a creature card from your graveyard and pay its mana cost: Put a number of +1/+1 counters equal to that card's power on target creature. Scavenge only as a sorcery.)
Sacrifice another creature: Regenerate Varolz, the Scar-Striped. | Adam Paquette
Feral Animist | Creature | Goblin Shaman | {3}: Feral Animist gets +X/+0 until end of turn, where X is its power. | Dave Kendall