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Mister Sinister discovered a mortally wounded Boom Boom and used her to create Boom Clones. He met up with the X-Men and Goblin Queen. Sinister offered to help them, but Madelyne, still angry over how Sinister had toyed with her life, used her telepathy to force Boom-Boom to kill him.[1]

Powers

Seemingly those of the Nathaniel Essex of Earth-616.



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