Mephisto, dark master of the Stygian Deep; vs. the Lich King, dreaded lord of the Undead Scourge and enemy of all life. Who Is Deadliest?!
Mephisto
Powers: Master sorcerer, near-god-like in power; has demonstrated manipulation of hellfire, shapeshifting, illusion casting, superhuman strength and durability, and many others
X-Factor: Devious and cunning, able to twist any situation to his advantage; always thinks several steps ahead of opponents
Lich King
Powers: Both the Lich King's natural powers and those given by the runeblade Frostmourne include: control over snow and ice; projection of dark energy bolts; the ability to raise and control the dead; and the entrapment of souls within Frostmourne
X-Factor: The combined minds of two of Azeroth's greatest powers and tacticians
My personal edge goes to Mephisto. The Lich King's main strength is using Frostmourne to feast on the souls of his enemies, and Mephisto doesn't have a soul. While the Lich King has fought demons before, none were of the same power as Mephisto.
This battle is over. For the results, check out the articles on Mephisto and the Lich King. Also, don't forget to check out the Advertisement Hub for the next battle.