Whiptail Devourer

This particular sub-species evade melee attacks far more often than other devourers of the same level, yet ranged attacks and spells still hit with the same frequency. This can be particularly annoying to melee-oriented warriors as your attacks never seem to hit. If the Whiptail Devourer is accompanied by high-damage support creatures (e.g. gargoyles with the ability to cast Conjure Phantasm) it is usually best to run past the Whiptail Devourer and engage the other creature, before finishing off the devourer.

They are found all throughout post Searing Ascalon. They use the skill Called Shot.