Ferys, Oblivion Sovereign

Collected Company - As long as you control twelve
or more other nontoken zombies, you may cast
Zombie spells from graveyards or exile and
whenever a card is put into an opponents
graveyard from anywhere, create a 2/2 black
zombie creature token.
Whenever an opponent casts a spell, they put the
top two cards of their library into their graveyard.