COSMO

Universe/Timeline: 
Marvel Universe
Status: 
Deceased
Category: 
Extraterrestrial
Nationality: 
Stygian
First Appearance: 
New X-Men (1st series) #123
Last Appearance: 
Uncanny X-Men (1st series) #480
Cause of Death: 
Apparently killed battling Vulcan on a Shi'ar moon