Has anyone ever killed a tulpa before?

No but I brought one to life

>>19465131
I have not experienced it personally, but I know what happens. Basically, imagine slowly poking someone to death in chains with a sharp knife. Each day, you take a poke. You will slowly be killing your tulpa, it would definitely be angry at you, but the more dissipated your tulpa is, the less likely you will care about what it says.

However, you can bring it back to life. Something about writing a letter, and placing it somewhere significant to your tulpa in your wonderland.

>>19465131
I've stabbed my tulpa many times. It was sort of a taboo exercise RP to test "living elements" on my tulpa side. A little bit of masochistic elements as well to expand the boundaries of my tulpa characteristics. It is not some insane tulpa right now it was some sort of dark meditation process to develop some aspects of my tulpa.

Besides that killing a tulpa would be just forgetting about it completely.