Gnash, the First Man

Gnash enters the battlefield with two +1/+1
counters on it.
{r}, {t}, Remove a +1/+1 counter from Gnash:
Deal 3 damage to any target.
{g}, {t}, Remove a +1/+1 counter from Gnash:
Destroy target artifact.
{r}{g}, {t}, Exert Gnash: Put a +1/+1 counter
on each of up to two creatures.
Whenever another creature enters the battlefield,
untap Gnash.