Slushy, Whimsy Ascended

Flying, Haste
Slushy cannot be the target of spells cast from exile.
{t}: Each player exiles the top card of their library. Until the end of your next turn, players can cast spells exiled from their library this way. Activate only as a sorcery.

Once per turn, you may cast an instant or sorcery from exile without paying it's mana cost.