Pyre Charger

The double-red commitment is the tell: only red sources pay for this, and the reward is a body that turns surplus red into reach. Coming down with haste, the 1/1 swings for one the turn it lands, but the firebreathing clause means every red mana left unspent converts to a point of power, so a flooded board feeds it rather than embarrasses it. That makes it a mana sink that asks for no build-around: in the late game an open pool becomes a clock, and haste lets the conversion begin the instant it resolves. The lineage runs through every mono-red firebreather since the archetype first appeared, from the Spark Elemental school of all-in one-drops forward, but stacking haste onto a double-red two-drop shifts this one off the curve's bottom and into the slot where the aggression is meant to be total. The pump is per-point and repeatable, which rewards holding red mana up rather than dumping it: an opponent never quite knows how large the next attack will be, since the combat math only resolves once you tap out. Fragile, low-floored, and ceilinged only by how much red survives to the swing.