The Pawn's Gambit

At the beginning of your upkeep, if you control one or more creatures with power less than target creature an opponent controls, put a
+1/+1 counter on each of those creatures.
At the beginning of your end step, if you control a creature with five or more +1/+1 counters, gain 2 life.
"Only the frail prevail, for no one thinks us a threat."
- Sora, King of Imanity, weakest of the Exseed races