A Boon Death (unofficial name) is the exact opposite of a Boon Doc, since the Boon Doc heals and the Boon Death kills. The Boon Death made its debut in the episode "The Unbeatable Master". It was also the first Boon Doc to be Ghouled. A Mega Morphed Boon Death appeares on the poster for the movie Ghoul From Beyond.
Dr. Blakk's Boon Death killed Shinai.
- Leachfang - Latches onto host and consumes life-force (Protoform).
- Grimbeam - Unleashes a concussive blast of pure darkness.
Boon Death using Leachfang