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
Skylasher | Creature | Insect | Flash
This spell can't be countered.
Reach, protection from blue | Dan Scott
Emmara Tandris | Legendary Creature | Elf Shaman | Prevent all damage that would be dealt to creature tokens you control. | Mark Winters
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
Ruric Thar, the Unbowed | Legendary Creature | Ogre Warrior | Vigilance, reach
Ruric Thar, the Unbowed attacks each combat if able.
Whenever a player casts a noncreature spell, Ruric Thar deals 6 damage to that player. | Tyler Jacobson
Zhur-Taa Ancient | Creature | Beast | Whenever a player taps a land for mana, that player adds one mana of any type that land produced. | Adam Paquette