Ancient Lab Crab

Infect (This creature deals damage to creatures in the
form of -1/-1 counters and to players in the form of
poison counters.)
Unearth {u} ({u}: Return this card from your
graveyard to the battlefield. It gains haste. Exile it at
the beginning of the next end step or if it would leave
the battlefield. Unearth only as a sorcery.)