Grakug, Beasttooth Berserker

Whenever Grakug, Beasttooth Berserker attacks, create a 3/3 green beast creature token.
Whenever a beast creature you control dies, put a +1/+1 counter on another target creature you control.
{3}{g}: Grakug, Beasttooth Berserker gets +1/+0 for each beast you control until end of turn. Activate this ability only once each turn.