Who Would Win?

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

Diana of Themyscira

Ambassador of Themyscira, warrior princess

Flight, Super Strength, Super Speed, Agility, Stamina, Invulnerability, Intellect, Healing, Magic, Weapon Master, Super Hearing, Insanely Rich, Unarmed Combat, Divine Powers, Immortal, Swordsmanship, Animal Control, Empathy, Marksmanship, Power Item, Stealth, Berserker Strength, Leadership

Lasso of Truth, Bracelets of Submission, tiara, God Killer sword, invisible jet, shield

All-Star Squadron, Amazons of Themyscira, Black Lantern Corps, D.E.O., D.M.A., Deputy Lanterns, Female Furies, Freedom Fighters, Furies, Gods of Olympus, Insurgency, Inter-Agency Defense Command, JSA All-Stars, Just'a Lotta Animals, Justice Guild, Justice League Dark, Justice League Europe, Justice League International, Justice League of Amazons, Justice League of America, Justice League Task Force, Justice League Unlimited, Justice Lords, Justice Riders, Justice Society Infinity, Justice Society International, Justice Society of America, Lords and Agents of Chaos, One-Earth Regime, Red Lantern Corps, Sinestro Corps, Star Riders, Star Sapphire Corps, Super Friends, Super Hero Girls, Super Powers, Team Wonder, Themysciran Embassy, Trinity, United Nations, United States Army, White Lantern Corps, Wonder Woman's Space Pirates, Wonders of the World