Religion: sentient planet fragment
First Appearance: Thor (vol. 1) #199 (May 1972): "If This Be Death..!"
Super? (Has Super Powers/Special Abilities/Technology): Yes
Number of Appearances: 3
Occupation: lab specimen
The alien Rigellians obtained a sample of the sentient living planet Ego and grew the sample into an independent living being. This product of a lab experiment was known as Ego-Prime.