Spark Reaper

The sacrifice-for-value engine at its most conservative, and the tax on the activation is where all the design tension lives. Aristocrats payloads live and die by how cheap the outlet is: a free sacrifice like Viscera Seer turns every death trigger into a chain, while a metered cost forces you to spend the turn deliberately. Three mana per activation puts this firmly in the second camp, which is both its ceiling and its floor. You are not looping it for value in a single turn; you are grinding one card at a time, converting expendable bodies and spent planeswalkers into fresh cards and small life buffers over the long game. That the outlet accepts planeswalkers as well as creatures is the quiet wrinkle: a walker still holding loyalty, but one you would rather cash out than lose to combat, becomes fuel rather than a stranded permanent, which most outlets of this kind cannot touch. (The timing does mean you cannot rescue a walker already at zero loyalty; state-based actions bury it before you can respond.) The 2/3 body is the giveaway that the card wants to sit back and be an engine rather than attack. What it offers is repeatable card advantage stapled to a creature, an effect black has always paid full price for; the steep activation cost is the concession that keeps a draw-a-card outlet from simply being free.