Mimicked Voices

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
When Mimicked Voices dies, return target creature card with converted mana cost X or less from your graveyard to the battlefield, where X is the number of cards exiled with this creature's delve ability.
"Sweetheart? Don't worry; you can come out, now. There's nothing out here..."