Forbidden Iteration

{0}: You may cast a spell from your hand without paying for it's mana cost. If you do,
end the turn once that spell has resolved. This ability can only be activated as a sorcery and only once per turn.
At the beginning of your upkeep, you may pay {p/u}{p/w}{p/b}{p/r}{p/g}. If you don't, change wayfarer.