Meadow of Eternal Light

(Meadow of Eternal Light is a land. It is not a spell and does not go on the stack.)
{1},{t}: Add {w}, {u}, {b}, {r}, or {g}.
Hexcry- Whenever you cast a colored spell, you may pay {2}. If you do, destroy target creature that is one of the colors of mana used to cast the targeted spell.