Exhibition Tidecaller

Mill as a payoff has always fought a scaling problem: three cards per trigger is nothing against a sixty-card library, and the archetype survives only by chaining triggers faster than the clock demands. The Opus ability answers that math with a threshold. Every instant or sorcery grinds three off a library, the small-ball floor, but pushing five or more mana through a single spell flips the same trigger to ten. That is the design tension worth watching: a one-mana body that does nothing on its own, gated behind a payoff that rewards casting big rather than casting often. Where older mill engines wanted a high spell count, this one wants a high mana ceiling, so the deckbuilding pull runs toward expensive X-spells, kicker, and buyback rather than a pile of cheap cantrips. The 0/2 frame is not a survival stat and not an offensive one: with zero power it deals no combat damage, so it can only chump or gum up the ground, stalling long enough to land that first expensive spell rather than threatening anything itself. And the mill can point at any player, which quietly widens the card past self-mill enablement into a genuine library-attack piece, the trigger scaling with the size of the spell rather than the number of them. It is an enabler that asks you to change how you build a spell deck, not just how many spells you run.