Kuldotha Flamefiend

The trick to this Elemental is that the artifact sacrifice is optional, but the six-mana body's only relevance arrives when you take the deal: a 4/4 for that price is filler, while a 4/4 that also throws four damage wherever you point it is a clean two-for-one or a sweep against small creatures. That conditional makes it a payoff piece rather than a curve-topper, rewarding a deck already treating cheap artifacts as a spent resource: drained accelerants, used-up equipment, leftover Thopter tokens, anything that has done its job and would rather become a burn spell than rot on the battlefield. The damage division is the flexible part, splitting four however you like across any number of targets, so the same trigger can snipe two utility creatures, clear three one-toughness blockers, or dome the opponent's face for reach. The design speaks to an artifact-matters era that wanted the aggressive color to care about its own permanents dying, converting attrition into burn instead of leaving spent metal inert. The cost of the power is plain and well-judged: with no artifact to feed it, the trigger simply does nothing, and you are left paying six for an oversized but ordinary 4/4. That is exactly why the card only lives in shells built to spend metal, where the sacrifice is never a question of whether but of where the four damage lands.