Ceresti, Mystic of Auroras

Flying
Each nonland card in your hand without foretell
has foretell. Its foretell cost is equal to its mana
cost reduced by {2}.
{x}{w}{u}{b}{r}{g},{t}: You may cast X number of
your foretold cards without paying their foretell
costs. Cards with {x} in their mana cost cast this
way use the X mana used to activate this ability.