Spawn

Put a -1/-1 counter on Spawn: Spawn gains one core ability until end of turn. (Core abilities include Deathtouch, Double Strike, Evolve, Exalted, Extort, Flash, Flying, Haste, Hexproof, Indestructible, Infect, Intimidate, Lifelink, Shadow, Shroud, Trample, Unblockable, Undying and Vigilance.)