Frenetic Knowledge

Clash with an opponent. Frenetic Knowledge deals 2 damage to the losing player and then you both draw a card. If an effect you control hasn't caused you to scry this game, repeat this process until you lose a clash. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)
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Make a card that discards one or more cards as a cost.