Millennius is an Asgardian that was banished to a place that exists between time and space. He truly believes that all mortals should be killed to ease their suffering and considers himself noble and compassionate. He claimed to have nearly killed Odin and it took him and many others to banish him.
He was able to make himself a castle in his realm and gain control over the slug-like beings that reside there. He was also able to acquire technology from invaders. He planned to escape, the barrier holding him there weakening every millennium. With his technology, he learned of the Silver Surfer and knew that his Power Cosmic could help him to create a portal and escape.
He was able to pull the Silver Surfer into his realm along with Thor when they tried to travel back in time. His Slugs helped capture the Surfer and Millennius used a machine to siphon the Power Cosmic from him and create a portal.
The Surfer escaped and the portal was closed by Thor and they managed to trap him in the center of his world temporarily, long enough for them to escape.
Millennius remains alive and trapped but the barrier continually weakens and one day he will return.
Powers and Abilities Asgardians possess the standard physical attributes of an Asgardian Male: Superhuman strength enabling him to lift at least 30 tons Asgardian Females 25 tons, superhuman speed far superior to that of the finest human athlete, stamina enabling them to perform at their absolute peak for at least 24 hours before even starting to tire, superhuman reflexes greater than a human's, superhuman durability that allows them to withstand powerful impact forces, extreme temperatures and pressures, falls from great heights, energy blasts and high caliber bullets without sustaining injury; and finally, Asgardians's agility is also superhuman. Asgardians also possess a regenerative healing factor, being capable of healing from injuries such as slashes and puncture wounds in a matter of hours, and mending broken bone within the day. They can't however, regenarate missing limbs or organs without magical assistance. The Gods of Asgard are also granted certain mystical abilities that in the past have shown to get them the power to change their appearance, transform matter and wield a numerous amount of different energies. Though many Asgardian Gods/Goddess' have not shown the ability to wield any type of energy or shown any mystic abilities these powers are inherent to all of their race. Like standard conventional Asgardian gods