Mage-Ring Bully

The deal a prowess creature usually makes is voluntary: you choose to swing it into open mana, and you choose when to pump it. This one strips out the first choice. The mandatory-attack clause forces a 2/2 body into combat every turn whether you have the spells to back it or not, which is the cost the design pays for prowess at the going rate: an aggressive beater you can never hold back to block, never sandbag on defense, never keep home while you set up. The payoff is that the downside lines up exactly with what an aggro deck wants its early creatures doing anyway. In a build that floods the board and chains cheap noncreature spells, attacking every turn is the plan, and the restriction goes unnoticed. Drop it into a slower shell that wants its creatures to trade or sit back, and the compulsion turns toxic: it taps out into combat on your own turn, walks into removal, and is rarely even available to block when the counterattack comes back the other way. That tension is the whole point. The compulsory attack is a tax only the most committed red aggro deck can pay without feeling it, and it sorts builders by intent: a clean, growing threat for the deck that was always going to race, dead weight for anyone hoping to play it on the back foot.