The Grendel Guard is described by its creator, Slink, in the COB's readme file: The ultimate in Grendel Control! This COB injects long-lasting protection against grendels. Once a minute Albia will be scanned for grendels. If one is found, you will be taken there to observe its demise. No more random acts of brutality and reservoirs of vile disease! The C1 class numbers used by GRENDEL GUARD are: * 2 3 211