As people go through life, they accumulate emotional baggage. These negative feelings amass over time inside of our “Soul Sinuses” where they can be resolved, ignored, or suppressed. If issues are left unresolved and fester for too long, these Soul Sinuses can become clogged, with negative feelings merging together to create Bad Vibes – malicious creatures embodying the intensity of those feelings. But we can't just go to a regular doctor for these kinds of problems – they wouldn't believe us. Enter Witch Doctors, spiritual figures able to extract Bad Vibes from within people's souls and either kill them or convert them into Good Vibes. They are aided in this process by Loa, spirit companions that can possess a Witch Doctor's body to give them brief enhancements.