Murac, the Soulclaimer

You may cast non Skeleton Creature spells from
your graveyard for their casting cost. They
become Zombies in addition to their other
creature types and gain decayed.
Whenever a Zombie you control dies, exile it
instead and, create a 1/1 black Skeleton Creature
token with all abilities of the Zombie that died.
Whenever another Skeleton enters the battlefield
under your control, draw a card.