For 10 points, name this ancient, intelligent galactic entity, a "Living Planet."
Before being imprisoned in the Stranger's Labworld, the "Prime" version of this character transformed three heroes into part of the Young Gods. The Fantastic Four damaged a propulsion unit used by this character which caused him to be broken apart by the Sun. This character attempted to conquer the Rigelians while it was part of the (*) Black Galaxy, and it was created by the Stranger. This character housed the Wanderers after Thor rescued it from an attack by Galactus, and the original explanation for its birth was its coming into contact with the consciousness of a human. This character is usually depicted as a large, purple sphere with a beard and eyes. For 10 points, name this ancient, intelligent galactic entity, a "Living Planet."
Before being imprisoned in the Stranger's Labworld, the "Prime" version of this character transformed three heroes into part of the Young Gods.
Ego the Living Planet (prompt on Living Planet before end of question)