Fanatic of Mogis

Devotion as a payoff is usually a static threshold or a creature that swells with your color count; this one cashes the entire tally in a single burst the moment it lands. The 4/2 body is almost incidental. What four mana buys is a Banefire pointed at every opponent at once, scaled to how many red pips already sit on the board. In a deck stuffed with one-drops and double-red costs that number climbs fast, and the entry trigger converts a developed red board into reach the deck would otherwise lack. The design rewards exactly the build mono-red already wants: a low curve, heavy color saturation, and a wide board. The two toughness is the tax for that flexibility, since the card is sold entirely on its enter trigger and the corpse it leaves behind is a bonus rather than the plan. Where most red aggro leans on burn held in hand to close, this folds the reach directly into a creature, so a board that would otherwise stall against a sweeper or a wall can instead redirect its accumulated devotion straight at the opponent's life total. The card also punishes the natural instinct to trade it off: killing the Fanatic after the trigger resolves does nothing to unwind the damage, and racing it means racing a threat that already spent its most important line the turn it arrived.