Haunted Library

The tax is the whole balancing act here. White has always had access to token production on opponent death triggers, but the effect usually comes stapled to a permanent body or a one-time payoff. Structuring it as a repeatable enchantment that fires on every opposing creature death, then gating each token behind a one-mana toll, does two things at once: it lets the engine scale with a board wipe or a grindy aristocrats matchup without ever generating tokens for free, and it turns your removal and your opponents' trades into a slow flying army. Optionality is what makes the toll bearable rather than oppressive: you choose which deaths to convert, so you are never forced to pour mana into a token you don't want, and you can hold up other spells and simply decline. Where it earns its keep is in the death-count math across a crowded board: several opponents feeding a single sweeper can hand you a fistful of Spirits in one turn, provided you have the mana to buy them all. That flying-token accumulation is a quiet clock, the kind that rewards patience over a game long enough for the payments to add up rather than a single explosive turn.