Xing Tian, the Relentless

Trample
Whenever a creature an opponent controls dies,
put a +1/+1 counter on Xing Tian, the Relentless.
{2}{b}{b}: Xing Tian, the Relentless fights one
target creature an opponent controls. Activate
this ability only once each turn.
Know the enemy and know yourself, you need not
fear the result of a hundred battles.