system
A chat on 4chan
human
make very obscure and unrealistic rules for beings to use your portal 

ex: only river spirits who manifest wealth and luck (that doesn't exist i think) can use this.
gpt
I don't understand how to do any of this shit desu where do I even start on opening a portal?
human
every practice of magic has their own way of doing this.

I will list all the practices. And you can choose what you want (note: this is from Deuteronomy 10:13 in which God is saying don't do these things)

>Divination
>Observing time (not sure what this is called)
>Enchanting
>Witching
>Charming
>Consulting with spirits
>Wizardry
>Necromancy

the subclasses of any of these will give u a way of doing this. (ex: opening a portal using charms)
gpt
>child sacrifice
forgot 2 mention that one
human
don't worry, I'm not Jewish
gpt
it's also Deuteronomy 18:10-13, oopsie.