I just watched it. I get it. I don't want to but I do get it. If your going to summon a god, be pure of heart and intention. Have a specific purpose, not just to see if you can do it. Do not have some one there who is an active leader in a belief that once persecuted the followers of the god being invoked. Most important know as much as you can about the deity being invoked and you better be one serious bad ass because a god bows to no one.