Common Crook

The death trigger doing the accounting here is older than the token it produces: black has been trading small bodies for future mana since the days of Blood Pet and its kin, and this is that same contract updated to Treasure. What the ramp costs you is the block. A 2/2 that leaves a Treasure behind is a body that wants to die, so it trades up or chumps freely, and either way the mana it fronts arrives a turn late and only once. The timing carries the whole weight of the design: the Treasure does not exist while the creature is alive, only after it is gone, which turns aggressive combat trades and sacrifice fodder into deferred, any-color fixing. The payload is deliberately generic: one mana of any color, one shot, no strings, exactly what a Treasure has always paid out. Nothing about this design is ambitious, and that is the point. It is a two-drop that reads as a creature but plays as fixing you have already spent, the kind of unglamorous connective tissue a sacrifice-fueled shell keeps reaching for because the death is a feature, not a cost. The trick is a single line of text stapled to a plain body: the 2/2 does the work while it lives, and pays a mana rebate once it doesn't.