https://occultist.net/how-to-summon-zagan-ritual/

I'm finally starting to understand how these sigils are logically constructed. It wasn't that they're some "low" technical design, it's that they're referring to such high dimensions that I couldn't relate to them being represented with just these lines.

Zagan may be the most powerful of the ones I've been in contact with aside from the Infernal Queen, Illivryn/Sepherenz.

Whatever dimension breakthrough I've done in this life so far, he can repeat that in his own dimension. I was just unable to see that dimension because I wasn't seeing over the wall yet, I had to reach up there on my own side first. Very powerful session, can't even explain how strong he is and what kind of spiritual guidance he can give.