Deadpool, Merc with a Mouth

Indestructible, hexproof
Deadpool can't be sacrificed.
{t}{ut}{t}{ut}{t}: Exile any number of cards from
your hand. For each card exiled this way, each opponent exiles a card from their hand. If they
can't, they exile the top card of their library. For
as long as those cards remain exiled, their owner
and you may cast them without paying their mana
cost.
"Fourth wall break inside of a fourth wall break?
That's like... 16 walls!"