Dwarven Bloodboiler

Triple-red in the casting cost for a 2/2 body is the first signal that this was built for a Dwarf-tribal payoff the era never quite assembled. The pump is parasitic in the truest sense: every activation taxes an untapped Dwarf, including Dwarven Bloodboiler itself, so the engine wants a wide board of cheap kin rather than a single attacker to lean on. Because the cost is a generic tap rather than the tap symbol, it can drain a summoning-sick Dwarf that could not attack anyway, converting a body that would otherwise sit idle into +2/+0 for whatever creature you point it at. The activation is instant-speed, so an untapped Dwarf left back on defense can still feed a surprise pump to a blocker and trade up against a larger attacker. The trouble is supply. Dwarf has always been among the thinnest of red's creature types, which is why the card reads more like an aspirational tribal lord than a functional one: the design hands you a scalable engine and then asks you to find the team. That tension is structural and unresolved, the honest account of why a creature with a flashy repeatable ability spent its career as a footnote. What it does illustrate is a recurring red design instinct of the period: pricing pump in creature-taps rather than mana, building damage out of board presence instead of cards. The instinct outlived the Dwarf shell; the shell never caught up.