Brother Mutant was an amalgamated being created when the Scarlet Warlock tried to imbue Magneto with the adamantium-laced skeleton of Wolverine and failed, causing Wolverine, Magneto, Quicksilver, Mesmero, and Scarlet Warlock to merge into a single being.
Brother Mutant was able to use the combined powers of the mutants that had merged to create him:
- Magneto: Magnetic Field Manipulation
- Mesmero: Hyper-Hypnosis
- Quicksilver: Superhuman Speed
- Scarlet Warlock: Hex Bolts and Chaos Magic
- Wolverine: Regenerative Healing Factor and Retractable Claws