Cho'Gath, Terror of the Void

Devoid (This card has no color.)
Trample
Whenever a creature dies you gain 1 life.
{2}{c}, {t}: Destroy target creature. Cho'Gath,
Terror of the Void gains +1/+2. If a legendary
creature is destroyed this way, untap Cho'Gath,
Terror of the Void.