Lennox, Dark Necromancer

Deathtouch, Lifelink, Menace

Whenever a creature card is put into an opponent's graveyard from anywhere, you may pay {b}. If you do, return that card to the battlefield under your control. It's a black Zombie in addition to its other types. Put a +1/+1 counter on it.

Whenever Lennox, Dark Necromancer attacks, you may sacrifice any number of Zombies. For each Zombie sacrificed this way, target player sacrifices a creature and loses life equal to the number of zombies sacrificed