How to summon a Succubus

Hi! What have you got there? Ahhh!!! Well, that's disgusting! I... heard it... that the black goat's head is needed for a strange ritual. It is conducted by warlocks in order to acquire a henchman from the other world - a succubus or incubus... You know, you'd better talk to the trainer. A succubus, though otherworldly, is still a pet.