system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Is Hela immortal as long as Asgard exists, or does she have to be on Asgard for that?
gpt
Hela draws her power from Asgard directly.  Having been imprisoned in Helheim for God knows how long, when she was freed she was already more than a match for Thor.  When she reached Asgard proper she seemed to supercharge, yes, but she was already immensely powerful before then.

As long as Asgard exists, Hela’s power will grow.  Proximity MIGHT hasten the effects, but it’s doubtful they’ll ever simply diminish.