"Opposites Attract"
Amalgamation of Brotherhood of Mutants and Metal Men.
Amalgams include:
Magneto: Magneto/Will Magnus
Antimony: Scarlet Witch/Platinum
Cobalt: Mastermind/Gold
Kokoro: Psylocke/Katana
Mister X: Professor X/Martian Manhunter
Sinistron: Mr. Sinister/Nimrod/Ultron/Brainiac/Sinestro
Bismuth: Toad/Tin
Iron: Unus/Iron
Nickel: Quicksilver/Mercury