Dwarvish Grenadier

Trample
Whenever a red or green creature enters the battlefield under your control, Burn 2 (put 2 Burn counters on target creature, planeswalker, or player. At the beginning of each players endstep, all permanents or players with burn counters on them take 1 damage for each burn counter on them, then remove 1 burn counter from each permanent or player with a burn counter on it.)