Cait Sith, Fortune Teller

Hexproof

When Cait Sith, Fortune Teller enters, you and target opponent each exiles cards from the top of their library until they exile three nonland cards. Then they secretly choose a card from among the other player’s nonland
cards exiled this way. During their own turn, they may cast one of those cards from exile without paying its mana cost.
If a spell cast this way was chosen by a player, that player reveals it and draw three cards. Then each player shuffles the rest of the exiled cards into