The Annihilator

Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents.)
Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
At the beginning of each combat, creatures you control gain trample until end of turn if a creature you control has trample. The same is true for infect, haste, and skulk.