Xanmire, Bloodthirsty Tyrant

Lifelink
At the beginning of your upkeep, target land an
opponent controls becomes polluted, then you
lose life equal to the number of polluted lands
that player controls. (It's controller loses 1 life
anytime it's tapped for mana.)
Pay 10 life: Put a number of +1/+1 counters on
Xanmire equal to the number of polluted lands
target player controls.