The Dustdevil Grendels are a C3/DS breed by Ghosthande based on a concept by Gobbo. They occupy the Grendel breed slot X, and clash with the Tiger Grendels. They were released as part of the CCSF 2012, and are also available at Ghosthande's site, Breeders Beware.
They come with a pack of agents which are geared toward making the Desert Terrarium a more habitable environment:
Ghosthande has also released the original models and textures used to create the Dustdevil Grendels.