Who Would Win?

Remy LeBeau

Thief, X-Men member

Super Speed, Agility, Stamina, Blast Power, Healing, Unarmed Combat, Gadgets, Escape Artist, Energy-Enhanced Strike, Marksmanship, Hypnosis, Energy Manipulation, Stealth, Leadership

Bo staff, kinetically-charged playing cards, body armor

Chevaliers, Dark X-Men, Excalibur, Exiles, Guardians of the Galaxy, Horsemen of Apocalypse, Jean Grey Academy, Knights of X , Marauders, New Orleans Unified Guild, Opposition, Serval Industries, Tempo Cadre, The Six, Thieves Guild, Time Variance Authority, Weapon X, X-Factor, X-Gene Mutant, X-Men, X-Ternals, X-Treme Sanctions Executive

Mephisto

Lord of a realm of Hell

Demonic Power, Reality Warping, Immortality, Soul Manipulation, Shape-Shifting, Energy Projection, Superhuman Strength

None (demonic power)

Hell-lords, Lords of the Splinter Realms; formerly manipulator of the Six-Fingered Hand