Black Dragons

I doubt this can be considered a disadvantage for the Warlock. Just think about it – there’s no dark magic in the guild, and there’s no light magic either, meaning no resurrection or vampirism. True, the Celestial Shield might protect them from being summoned, which is certainly a drawback, but there’s also the Phoenix, and it’s just as good for Warlocks as it is for Mages or Necromancers. Plus, these creatures can’t be controlled, and divine magic doesn’t affect them. So, I think there are both disadvantages and advantages here.