Unnerving Assault

Most hybrid instants treat the dual-color symbol as a discount: cast it from either color, get the same effect. This one treats the symbol as a question about what the colors do together. The effect keys off which mana you actually spend, so the same card splits into three combat tricks depending on the lands you have open. Spend blue and your opponents' team loses a point of power; spend red and yours gains one; spend both and you get the full two-point swing across both boards. That makes color access a turn-by-turn lever rather than a fixed deckbuilding constraint, and it rewards a deck for reaching both colors instead of penalizing the turns it only has one. The numbers stay modest on purpose. There is no toughness reduction, so it kills nothing outright; the payoff lives entirely in the attack step, cast after blockers are declared and before combat damage, where a single point of power swings a trade or pushes a couple of extra points through an already-unblocked attacker. It is a design that asks you to hold up the right mana and read the board, then decide which of its three modes the moment calls for, all without ever printing the word "modal" on the card.