Wish

Spells your opponents cast that target this spell
cost {3} more to cast
Search your library, graveyard, exile, and or your opponents library, graveyard, and or exile for a
card with converted mana cost equal to or less
than {x}. You may cast that card until end of turn without paying its mana cost. If there is an {x} in its mana cost, it is equal to {x} - the
converted mana cost of the spell. That spell can't
be countered.