Syr Gideon, the All-Knowing

If you would draw a card, exile the top card of your library face down instead. Then an opponent of your choice guesses even or odd. Reveal the exiled card. If the mana value of the revealed card matches their guess or it’s a land, put the card into your hand. If their guess doesn’t match, copy the revealed card and you may cast the copy without paying its mana cost. Then put all cards exiled this way into your hand. (Copies of permanent spells enter as tokens.)