Extremely powerful, yet highly overrated. Her claim to fame comes from her mind-controlling a planet of around 92 million people (far less than the Earth’s population). It’s a great feat, but what they neglect to tell you is that she had to divide her attention on different things and the mind-control was subtle pushes, not full on control of the mind. That being said, the fact that she did conquer an entire planet is extremely impressive. I’m not saying it to say Moondragon is bad, but most people rate her above Jean and Xavier based on this feat alone without considering all the context, so I’m giving all the angles. Great feat, but with heavy context.
She has other feats, but that is her most notable one and the one every single Moondragon fan will site.
Then there was an alternate counterpart that permanently came to the 616. She is a far better telepath than the 616 Moondragon, beating her in psychic battle, despite the 616 version getting the first shot.
These two ended up merging, so now we have an all-around more powerful Moondragon composed of both the original and alternate version. This one won her psychic fight against the Greek God, Hermes, by catching off-guard and trapping him in Groot’s mind. (Cause apparently the god could not cross the language barrier of Groot? Eh.
Point being, Moondragon is definitely one of the better psychics. Not the absolute best, but she is up there.