Rakdos Guildmage

Both abilities cost four mana to fire, which is the tell: this is a two-drop built to soak up flooded lands in the late game rather than press an advantage in the early one. The hybrid casting cost lets it slot into any deck that touches black or red, but the activations are deliberately back-loaded so the 2/2 body never threatens to take over a board on its own. The black half is repeatable removal that taxes your hand: discard a card to shrink something by two, which kills the small and softens the large while turning a clogged grip into a resource. The red half is a recurring drip of pressure, not card advantage: a 2/1 Goblin with haste that swings once before being exiled, committing nothing for an opponent's sweeper to catch and accumulating nothing either. Neither mode closes quickly, and that restraint is the logic of how this kind of split-mode guildmage was constructed across its color pairs: a single creature that converts excess mana into either attrition or reach, picking the relevant lane game by game. The discard attached to the removal is the lever that keeps the black side from being a clean mana sink; you are spending cards as well as mana, which is exactly the friction a grindy black-red deck wants to pour its surplus into.