This is one of those extreme rituals (like Intranquil Spirit and all the elevator game things) that is promoted to beginners who may not always be 100% certain magick is real, so please be careful before making any commitments about giving your soul for eternity or agreeing to anything the spirit demands.
Otherwise it;s like a 17-year old guy walking inot a secondhand car dealership saying “Yo daddy just gave me half a million dollars, what’s the best car?” - and getting ripped off, because of inexperience and putting too much payment on the table which makes spirits, just like people, sometimes become greedy and dishonest.
So please be careful what’s in the words of the ritual!
And please read this: