Silverquill, the Disputant is a four-mana Elder Dragon from Secrets of Strixhaven that gives every instant and sorcery you cast Casualty 1, meaning every spell becomes two spells if you have a creature to spare. Build a wide token board, copy your removal, double your card draw, and win by making every spell count twice. This guide covers the full strategy and five must-include cards with direct TCGPlayer buy links.
