Deepfire Elemental

Repeatable removal whose price tag rises with the size of the target, and the arithmetic is what keeps a 4/4 with an open-ended kill switch from running away with a grindy game. Destroying something of mana value X costs , so the meter climbs at two mana per point plus one: a two-drop runs five, a three-drop runs seven, and anything genuinely expensive sits out of reach until your lands pile up past the point of usefulness. That steady linear climb is the balancing act, because the activation is cheapest exactly where you need it least and steepest exactly where you need it most. The one place it gets quietly generous is the bottom of the curve: a target with mana value zero costs a single mana to destroy, which makes the elemental a remarkably efficient answer to zero-cost tokens and the cheapest artifacts on the board. The mana-value gate also draws a hard line against the unconditional "destroy target creature" effects black-red usually reaches for first: this whiffs entirely on anything priced outside what you can pay, so what you are buying is repeatability, not reach. It belongs to a design sensibility fond of activated abilities that turn surplus mana into recurring pressure, a slow attrition body that gnaws away at small permanents over a long game rather than the spot removal black-red typically wants on turn three.