When casting a spell with Cascade, does it use the CMC of the spell with Cascade for reference of what it is looking for? Or does it use the mana cost that was payed.
For example, if I am to cast Maelstrom Wanderer with commander tax applied to him, so he costs 10 CMC instead of 8 CMC, would I reveal until I find a spell that costs less than 8 or 10 CMC?