Mathemagics seems a bit broken
The idea that this card can be cast for a relatively low mana cost and completely deck out the opponent seems a tad unfair. Maybe I'm completely wrong and it's no different than other noncombat win conditions but for less than 8 mana my entire deck was drawn into my hand simultaneously in one go. My win condition, Approach of the Second Sun, is only one mana less to cast but it requires a second cast to actually win which means either you have to have two in hand or dig for it aggressively. Either way, unless it's super late game or you pair it with a strong mana multiplier strategy it gives the other player at least one turn before they're out. There just doesn't seem to be enough of a tradeoff or cost to it to be a fair win condition, at least not compared to the other ones Ik of.