I quite like most things about this adventure, but there are a few things that bother me.
First, Eric's name is spelled Erick in the label for his picture. Second, the benefits of Sponsored Magic (Leyline) aren't made clear. It looks like Eric has an extra specialization and two extra minor consequences, but I'm not sure that that's all. Third, the description of Eric's spirit attack rote says that he rolls Discipline at +7, but my count says +8. Fourth, the Rock Demon's Vise Grip stunt treats grappling as a non-attack trapping. Given the existence of the Wrestler stunt in YS and the attack-like nature of grappling, I don't think that this is appropriate.
I also don't like mental attacks with spellcasting or the skill list of Damocles Ravenborn, but that's more personal opinion than anything else.
PS: Who is Russel?