They take contracts to put down uprisings, clear out rabble, and eliminate scouts and skirmishers, and they revel in the butchery they create, their unhinged laughter rising above their victims' screams.   With senses sharp enough to pinpoint the locations of nearby invisible creatures, canoloths respond unfailingly to any threat to their charges. Furthermore, they emit a magical distortion field that prevents creatures close to them from teleporting. Canoloths confront intruders with swift and terrible force, projecting long, spiny tongues to grab their foes and drag them close. What happens next depends on the contract. Unless instructed to kill, a canoloth merely holds onto its prisoner, but if given the order to do so, it tears its prey limb from limb.