Practice doing enough fun mind drugs and you can start adding and subtracting dimensions to/from them. They get mentally painful if you add too many, especially if the control gets away from your conscious control as you start to witness infinity (or into unfathomable territory that the ability to perceive clearly enough is lost). I've tripped a lot, and nothing has ever been quite as terrifying as "infinity." DMT was the only one that's made me nope the fuck out and take a very long break from ever touching psychedelics again. High doses of LSD are a joy in comparison, and those literally feel like you die.

I don't think there's anything implicitly mystic about the experience. The mind can just simulate/model data, and certain drugs make it easier to interface the conscious self with the models. But, since anyone can just do drugs and not everyone can explain their experiences, they can lead to some abnormal beliefs, especially combined with the boost in neuroplasticity. Do such things too often and you may end up with schizo longposter syndrome, forever disconnected from those with brainrot attention spans. Forever questing for the almighty hypercube...