Rakdos Hateflayer

First Strike
Whenever Rakdos Hateflayer deals combat damage to a defending creature, put a massacre counter on it.
{b/r}{b/r}{b/r}, Sacrifice Rakdos Hateflayer: Rakdos Hateflayer deals 3 damage to target player. If Rakdos Hateflayer had a massacre counter on it, that player discards 2 cards.