Blind Seer (who is Urza in disguise no, really!) can change the colors of both spells and permanents repeatedly
Either way, itll be right at home in your five-color Commander deck
The card is cheap and effective, and it even has a lot of combo potential
It has one of the strongest colorless ETB effects in the game, giving you protection the turn you cast it, so you get a nice advantage even if you cast this card in the late game
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However, if you do choose a target, and that target is illegal at the time the spell tries to resolve, the spell won't resolve and none of its effects will happen