Iron-Heart Chimera

A creature that exists to make another creature of the same type bigger, paid for by removing itself from the battlefield: that is a tribal payoff with no tribe to support it. The Chimera type was vanishingly small at the time of printing, so the sacrifice ability reads less like a synergy engine and more like a thought experiment about self-reference. The +2/+2 counter and the granted vigilance stick permanently, which makes the value real, but the only valid target is another Chimera, and Chimeras were never seeded densely enough to make that a plan. The design logic is the curious part: it pays for its upgrade by trading one body for a permanent buff on another, so two copies want to fold into one, escalating a single Chimera while board commitment stays flat. And because the ability carries no timing restriction, the sacrifice is more flexible than it looks: you can let it eat removal, hold it until after combat damage to dodge a blowout, or cash it in at instant speed to solve a combat-math problem. What it represents is a fossil from a design discipline that would print a tribal mechanic on a tribe of one or two cards and let the design space sit empty, trusting later sets to fill it in. That backfill never really came for Chimeras, so the card stands as a small monument to a payoff structure waiting for support the type never received.