The Dead Never Die

Delve (Each card you exile from your graveyard while casting this spell pays for {1} .)
Return each creature from your graveyard to the battlefield. Those creatures become copies of a non-legendary creature exiled with The Dead Never Die but keep their original base power and toughness.
"So young and strong. It would be a waste to see their bodies go to waste, wouldn't it?" -Lim Dul