Bonded Construct

The drawback is the whole pricing structure here: two power for one mana is a rate aggressive red decks would normally pay extra for, and "can't attack alone" is the leash that buys it back. The restriction is almost free in the deck this was built for and crippling everywhere else. A go-wide aggro shell that floods the board with bodies never wants to attack with a single creature anyway, so the clause taxes a line of play it would not choose; a control or midrange deck that wants to send one beater into the red zone and hold the rest back finds the same clause unworkable. That conditional efficiency is an old design lever for cheap beaters with a sting: the cleanest comparison is a creature that hits hard only when the team commits, with the body underpriced precisely because it cannot operate solo. As a colorless artifact, it sidesteps the color requirement that usually gates this rate, which widens the range of aggressive decks that can field it without distorting their mana. What it never does is attack into an open board on its own terms, and that is the line the design is engineered to forbid.