Garold, Derr'na's assistant

Undead creatures you cast cost {2} less to cast.
Zombies you control have undying. (When a permanent with undying is put into a graveyard from the battlefield, if it had no +1/+1 counters
on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
Even I need an assistant.
-Derr'na, first zombie lieutenant