Abomination of the Depths

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)
At the beginning of your upkeep, choose an instant or sorcery card you own in exile. That card gains recall until your next turn. Its recall cost is equal to its mana cost. (You may cast that card from exile for its recall cost. Then shuffle it into its owner's library.)
"Fear the darkness of the depth." - Thassa