Grommash, Truescar Chief

When Grommash, Truescar Chief enters the battlefield, creatures you control have haste and trample until the end of turn.
Whenever another creature dies, put a +1/+1 counter on Grommash, Truescar Chief.
{b}{r}{g}, {t}: Grommash, Truescar Chief deals damage to target creature or planeswalker equal to the number of +1/+1 counters on it.