Toxic Grendel

The Toxic Grendels are a duo of two banshee grendel breeds made by Grendel Man:
 * Sewage Banshee Grendels
 * Garbage Banshee Grendels

Both of these could be found at KnyteTrypper's C3/DS Nexus and Creatures @ CU7.

It can also be used to describe any grendel capable of living in a poisonous environment, such as the earlier Toxic Grendels by Darkhole87.