Kazar, The Impaler

Double strike

If you have not attacked by the end of your turn, you may play two lands at the beginning of your next upkeep.

Whenever a nontoken permanent you control is destroyed, you may exile it from your graveyard. If you do, you gain life equal to it's mana value.

{x}{g}{w}: Put X +1/+1 counters on each creature you control until end of turn, with X being the number of green mana you used to active this ability.