Tattermunge Maniac

A 2/1 that costs one mana is already past the curve, and the must-attack clause that pays for it is nearly free in the deck that wants this body: a hyper-aggressive shell has no use for a one-drop that sits back blocking anyway. The compulsory swing is the cost on paper, the irrelevance in practice. The real wrinkle is the casting flexibility. Either red or green pays for it, so the card drops into a mono-red aggro list, a mono-green stompy list, or a Gruul build that has both open, with no fixing penalty. Hybrid mana of this era was built precisely to make a card portable across two color identities without splashing, and a cheap two-power beater is the cleanest possible test case: the body and the forced-attack rider are color-agnostic, so the dual castability is pure upside. That rider does carry a genuine downside in slower games, where opponents plan blocks around a creature that telegraphs its move every turn and can never be held back to trade defensively. That is the honest tax for the rate, the same bargain other aggressive one-drops accept: in a deck whose entire plan is forward motion, a creature that refuses to do anything else stops being a liability and becomes the whole reason it is in the deck.