History
Moondragon was one of countless heroes and Avengers summoned from across the timestream by Kang to defeat Ultron. The accumulated presence of heroes and time jumps caused by the Kang/Ultron War ultimately crashed the timestream altogether.[1]
Notes
This character may not be native to Earth-10071 as they were plucked from all across the time stream and presumably killed during the battle, meaning this could come from any other reality instead.