mark Grayson (invincible), the son of a viltrumite named Nolan grayson (Omni-man) mark lives up to his superhero name and is actually invincible

a giant lizard guarding the roots to keep Freya from leaving Midgaurd, you need to kill Nìdhöggr to break the roots and free the Valkyrie queen.

an 80 foot hellhound of the norse realm helheim, he has been freed from his shackles and will cause terror in the 9 realms. will you kill him to save lives, or tame him and overthrow every kingdom?