Ballad of the Black Flag

Three chapters of mill-into-selection, then a discount, and the whole thing lives or dies on how narrow "historic" turns out to be. The card mills three and lets you take a historic card from among them, which in most decks means artifacts, legends, and Sagas: exactly the pool the fourth chapter then cheapens by two. That coupling is the design idea. The first three chapters aren't just card advantage, they're a filter that fills your hand with the specific spells the payoff rewards, so the deck-building constraint (skew historic) is baked into the reward loop rather than bolted on. The mill is real but incidental; you're digging through your own library to build toward a turn where the discount actually lands, and the Saga's clock (sacrifice after IV) forces you to have that turn ready rather than sit on the enchantment indefinitely. The tension worth noticing is that the selection is conditional: you only bank the mill's cards if what you flip up is historic, so a light-historic shell gets three chapters of pure self-mill with nothing to show for it, while a dense one turns each chapter into a tutor-lite dig. It reads as a value engine, but the fourth chapter reframes it as a setup piece for a burst turn, and the cards you salvaged along the way are the fuel that turn wants.