Savage Dragon #83
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Dragon tries to escape his cell under the Gladiatorial arena, but he's beaten by a creature named Droog. Dragon eventually is put in to the Arena of Death to fight for his life. He seems to be attacked by BrainiApe himself, but BrainiApe is just messing with his mind, making him think that Madman is the enemy. Brainiape controls Madman and the rest of the Atomics and gets defeated in the arena.