Well real tulpas are thoughforms made manifest. I’ve only heard of one ever working, it’s a very advanced form of magick that takes decades of building your skills to do. I guess it’s a combination of being able to create thoughtforms, aka servitors, and being able to manifest physical objects.
The original book on this was very interesting. Unfortunately now I look for it it’s obscured by a lot of fiction but if I find it I’ll post it. It’s decades old now, and talks about a woman who created a tulpa that got out of her control. It was indistinguishable from a human being.
We have some discussions that are mostly about the original idea of a tupla. I encourage you to try the search here, we have a decade of posts and as our culture asks people to always contribute intelligent discussion and never shitpost or get chatty, they’re usually of high quality content and worth your time browsing.
https://forum.becomealivinggod.com/search?q=tulpa
Darkestknight talks about the same book I mean here: