Dheron (Earth-Prime)

"He'll become unstoppable...and it will be impossible to release the Life-Forces held in his lair. That's what happened on Planet Dheron."

- Querl Dox and M'gann M'orzz

Dheron is a planet overtaken by Phantoms and their Progenies.

History
At some point, Dheron was attacked by Phantoms and its residents were infected with their Life-Forces taken to the Prime Phantom's lair. The planet was then overtaken by Phantoms, with the Life-Forces being impossible to be released.