Because of the various books that the GM had informed me that he had been using, I knew on a meta level that Psions are all connected to the plane of force. If you do it right, you can go on an easter scavenger hung and sever a psion's ties to the plane which is a lot like forcefully making a cleric or paladin lose the favor of their god, all those abilities go bye-bye. Since the GM was so kind as to tell me that I knew everything about the plane of force, I thought I'd go and ruin the BBEG's day. Now, I only had three rounds left in my time stop, and I didn't really want to risk the BBEG figuring out what happened and being trapped with a level 40 psion on the plane of force, wizard or not. So, I got busy and cast gate, a gate to the point where the place between the negative energy plane and the quasielemental plane of void. I then take advantage of the GM's oh so generous permenancy house rules and dump 25k gold worth of diamond dust- out of about a hundred thousand that I had on my person- on making that gate permenant. Not wanting to be there when the chaos from that started up, I renewed my time stop and plane shifted to the material world and watched the unfolding chaos.

Thanks to my second casting of Time Stop, I had another two rounds to do as I will, so I cast an extended black tentacles and greater invisibility on myself. After that, I just spammed maximized empowered enervates from a staff until the fucker died. with psionics fizzling out of existence, he was a level 40 commoner. Thankfully, there are no saving throws versus enervation, so he died quickly and the GM had no plot because psionics didn't exist anymore, the plane of force was gone.

WHAT? No, that can't be! Retcon time.

The GM changes it to before I started casting enervates and then he got dramatic about the earth shaking from the wild things being thrown out willy nilly by every psion in the material plane, and I managed to cast psionic resistance on myself, a spell that the GM had made available as an analogue to spell resistance since psions were everywhere, and that helped me avoid some nasty stuff that was being tossed in my direction. Every Psion was apparently discharging every power point they had at random. Because I used plane shift to get back to the material realm. The BBEG apparently still had his psionics under full control, and so I was confronted with a monologue of doom with psionic chaos being thrown around in the midst of it for drama. I pull out another scroll of timestop (because I had an asston of the things because why not?) and then I cast planar adaptation on myself and immediately left for one of many private demiplanes I have without waiting for him to finish. The BBEG followed me through what I assumed was GM fiat. So I cop out and get a scroll of Greater Demiplane out of my handy haversack, a scroll because I don't have six hours to actually cast the spell, so I can add a new property to the demiplane we were standing in. I chose "nonpsionic."

The GM stared at me blankly. I said that one of the many things you can do to a demiplane is make it so that there's no magic in it. Since he provided so many magical things that could affect psionics like psionic resistance, detect psionics, and other things for the sake of the setting and left it open to other things, I said that it was only logical that I could do it with a demiplane. He vetoed it by saying that the psions' connection to the plane of force is inherently different from magic, so it a demiplane couldn't block it out... even though there's such a thing as an anti-psionics field, but whatever. I personally think it was the GM not wanting his terrible BBEG to turn into a level 40 commoner again, but that's just my opinion. Since the GM vetoed letting me negate psionics. In this plane, I had a bunch of constructs of mine crafting shit because you can totally do that if you give them a brain. Expensive, but awesome. WHis demipane had the fire dominant elemental trate, so my constructs that healed with fire damage and got obscene ammount of hp per round and already had a buttload of temphp on top of their normal max because this is where they lived, so I cast dimensional anchor on the BBEG and used my control over the constructs to just have them drop what they were doing and mob him.

Greater invisibility > an antidetection spell > spam maximized empowered enervations.

And that, is how I got kicked out of a pathfinder group first session.