Yuletide Wishlist

Yuletime Wishlist enters the battlefield, choose X
cards you own from outside the game and put
them into exile.
{t}: Put a card exiled with Yuletide Wishlist
into your hand. If there are no more cards exiled
with Yuletide Wishlist, sacrifice it.
"I have been very good this year. I would like a pair
of Lightning Greaves, a new Sword of Feast and
Famine, and a pet Birds of Paradise."