Read more about Mangog at: Wikipedia
Official Site: Marvel Comics
Mangog first appears in a multi-issue storyline in the title Thor, and is depicted as being the sum total of the hatred of a billion billion beings that were once killed by the ruler of Asgard and the Norse Gods, Odin. Imprisoned beneath Asgard, Mangog is accidentally freed by the Rock Troll Ulik who reading an inscription on the door thinks he could be an enemy to Asgard. When Mangog is released he easily defeats Ulik. Mangog storms Asgard, intent on drawing the Odinsword from its scabbard, which will end the universe. Odin' son, the Thunder God Thor, battles Mangog to a standstill until Odin defeats Mangog by restoring the race he slew to life, which reduces the creature to a diminutive size.
Mangog becomes a perennial foe of Asgard, reappearing when freed by the god Loki (defeated when cut off from the source of its power) and aided by a traitorous magician called Igron. On the second occasion Mangog assumes the form of an imprisoned Odin, and after slaying Igron and attempts to banish Thor's ally Balder. He takes part of each Asgardian's lifeforce, weakening them and planning to draw the Odinsword. After a series of skirmishes with Thor, the creature is defeated when Thor frees Odin.
The character appears in the second volume of Thor as the servant of the Titan Thanos, who is seeking universal domination. Mangog is eventually destroyed by Thor (the character places his mystic hammer Mjolnir in the creature's mouth and blasts it internally) and Thanos (later revealed to have been a "Thanosi" clone) was defeated. Later, in one of the final issues of the second volume of Thor, Mangog was again destroyed by Thor, seemingly for good when Thor used the Odinforce to erase him from existence.
No match records for this character.