system
Given the following post, respond as if you're commenting on Reddit:
human
[DC Comics] So how powerful is Mr. Mxyzptlk? What are the most impressive things he can do?
gpt
Anything short of unmaking his entire universe, really.

He's effectively a whisker short of true omnipotence, only limited by his status as a fictional character. (A fact he is aware of.)

He could tear every individual atom in Superman's body apart. He could pack the entire Earth, and everything on it, into a sphere less than a nanometer wide. He could bend the gods of the DC universe to his will without effort.

And despite all his power, he still holds back immensely, because he finds it fun to mess with lesser beings like Supes.