War Squeak

Aggro auras have always fought a two-front war: they need to be cheap enough to justify committing a card to a creature, and they need to earn back the tempo they cost. This one solves the second half by bundling the evasion onto the enchant trigger rather than the aura's static line. The +1/+1 and haste stay on your creature, but the "can't block this turn" clause points at something the opponent controls, so a single red mana strips a blocker off your alpha strike and pumps a fresh attacker in the same beat. Haste on an aura is the quiet tell of what the card is built for: you cast it the turn the creature arrives and swing immediately, before anyone can react to a threat that would otherwise sit summoning-sick. The whole thing lives in that one-turn window. The blocker removal lasts only through the current combat, the enchanted creature keeps the +1/+1 and haste, and the package asks you to have already decided who dies in combat before you cast it. It reads as a combat trick that happens to leave a permanent behind, and that shape is what survives the card-disadvantage math: you are not paying for a lasting buff so much as buying one decisive turn of unblocked aggression, with the residual stats as a bonus rather than the point.