Ghostly Imprisonment

When Ghostly Imprisonment enters, each
player exiles a card from their hand.
{p/u}{p/u}{p/u}{t}: Tap target permanent and put a
curse counter on it (Whenever a permanent with a curse counter would enter a graveyard, exile it instead). Then, you may choose target card from an exile and play it this turn. You may use mana as though it were mana of any color to cast that spell.
{6}{u}{u}: You may choose a card from an exile and play it this turn without paying its mana cost.