system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] I somehow become a wielder of the infinity stones and I manage to use their full potential. What cosmic rules I must abide by to avoid being erased from existence by other higher beings who regulate the cosmos?

So I basically win the game and I can do whatever I want(or maybe not?). What things would trigger a more powerful being to take action on me? What are the rules for beings such as myself?
gpt
With all 6 infinity gems you ARE the higher power. Thanos defeated the universal abstracts when he wielded all 6 gems. Just by virtue of having that power the beings like Eternity will recognize you and attempt to remove the power, but you’re stronger than them. 

Basically at that point you have full reign over the universe and can do anything you want up to and including destroying the universe. 

The limits of the gems only working in their home universe means that you can’t use them for multiversal shenanigans so you’re free to do whatever you want with your universe.