Raging Kronch
The tradeoff is right there in the one line of text: a 4/3 for , a body clearly overstatted for its cost, in exchange for surrendering the option to swing solo. That single restriction is the entire balancing act. A 4/3 for three with free rein would price out most of red's other three-drops; forcing it to bring a friend to the combat step means it only pays off on a board that is already going wide, which is exactly the deck red wants to be pushing toward anyway. The design knows its lane: a beater that punishes the go-tall control player and rewards the swarm. The wrinkle worth noting is what "can't attack alone" actually gates. It restricts declaration, not damage: pair it with any second attacker, even a lowly token, and the Kronch is free to do its full four. It cares nothing for how the fight resolves after blockers, only that it did not walk into combat by itself. That makes it a curve-topper for aggressive decks that flood the board early and dead weight in any deck that stalls out to a single threat, a clean, legible line for a creature meant to fill out the bottom of a red aggro shell rather than headline it.
