War of the Spark

Kronch Wrangler | Creature | Human Warrior | Trample Whenever a creature with power 4 or greater enters the battlefield under your control, put a +1/+1 counter on Kronch Wrangler. | Steve Prescott

Paradise Druid | Creature | Elf Druid | Paradise Druid has hexproof as long as it's untapped. (It can't be the target of spells or abilities your opponents control.) {T}: Add one mana of any color. | Nils Hamm

Pollenbright Druid | Creature | Elf Druid | When Pollenbright Druid enters the battlefield, choose one — • Put a +1/+1 counter on target creature. • Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Matt Stewart

Snarespinner | Creature | Spider | Reach Whenever Snarespinner blocks a creature with flying, Snarespinner gets +2/+0 until end of turn. | Yeong-Hao Han

Huatli's Raptor | Creature | Dinosaur | Vigilance When Huatli's Raptor enters the battlefield, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Randy Vargas

Merfolk Skydiver | Creature | Merfolk Mutant | Flying When Merfolk Skydiver enters the battlefield, put a +1/+1 counter on target creature you control. {3}{G}{U}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.) | Sara Winters