White Scavenger

White Scavenger is black.
Whenever a creature with lifelink blocks or is blocked by White Scavenger, White Scavenger gains deathtouch until end of turn.
Metamorph {b} ({b}, Exile a creature you control that shared a creature type with White Scavenger: You may cast White Scavenger without paying its mana cost. Activate this ability only any time you could cast a sorcery.)