Graveyard Retainer

Whenever you cast a zombie spell, you may return target card from your graveyard to your hand.

A whirlwind burst out of the tear-drenched earth,
a wind that crackled with a bloodred light,
a light that overcame all of my sense,
and like a man whom sleep has seized, I fell.
-Dante Alighieri, "Inferno Canto"