Endrider Catalyzer
A ritual on legs, waiting for a permission slip. Once this Human Warrior reaches max speed, tapping it produces double red every turn, which is the burn-your-own-mana loop ritual effects have chased since the earliest days: a body that funds a haymaker turn, a second threat, or an extra burst of reach while the opponent is already reeling. But the acceleration is gated behind the same clock that defines an aggressive red deck's plan. Speed only climbs on turns an opponent loses life, and it caps at four, so the mana never comes online for a deck that stalls out. By the time the engine redlines, the tempo lead that got you there may already be the whole game. The payoff is a reward for a board state you were fighting toward anyway, not a tool that helps you get there. The design is honest about that trade. A 3/1 for two mana dies to nearly everything, and the mana it eventually makes is theoretical until you have already put damage on the stack. This asks for the exact deck that needs no help finding early life loss, then rewards it by converting that pressure into explosive follow-through rather than solving the problem of applying pressure in the first place.
