Anjare, Selesnya's Champion

Vigilance, lifelink
Each upkeep, choose a player. If that's player doesn't control a green or white creature, you gain 4 life and you may put a +1/+1 counter on target creature you control.
At the beginning of your end step, if a creature you control has 15 or more +1/+1 counters on it, destroy target player.