Chainbound Shadow

When Chainbound Shadow enters the
battlefield, each player discards two cards.
You may cast spells from your graveyard as
though they were in your hand.
At the beginning of your upkeep, if Chainbound Shadow is in your graveyard, you may pay {2}{b}. If you do, return it to the battlefield, then
exile up to two target cards from target
opponent's graveyard.