These black, drake-like creatures roam portions of the Underworld in packs of two to three. Sometimes they engage in fights with the Smite Crawlers that occupy the same area.
Coldfire Nights are somewhat difficult to fight, because of their large collection of interrupting and slowing skills.
They are very difficult to tank as they will always ignore the warriors and go after the spell casters, even if warriors engage them for some time first.
As nearly all Coldfire Nights have a specific patrol path, one way to easily kill them is to set traps at a spot in their path and move away before they come back to trigger them. This tactic is often referred to as Path Trapping or Foot Trapping.