The only psychedelic that caused me to see entities was dmt. After I smoked every day for a couple of months I saw them wen I turned the lights off. But they weren't cheerful machine elves they were shadow people with claws. I now have really bad night terrors were I'm being attacked at least once a week. The shamans say that dmt opens u up to the spirit realm. If you can go visit them they can come visit you. Actually once on shrooms I could see a dozen black creatures in my tree outside staring at me. That was my only bad shroom trip. Daily psychedelic use can imprent on you. Kind of like lsd flash backs I guise. It's possible you saw ghost homie.