Move away from the add before it swipes to avoid this extra damage.
Nidhogg will do a Deafening Bellow every so often throughout the fight.This will be a huge AoE blast of fire, followed by a room-wide AOE with a safe line along the length of Nidhogg's body.
Avoid the flyover AoE and "Hot Wings" AoE.This encounter can be especially tricky for those whom have only done Main Scenario Quests, as coordination and positioning are critical, especially during the second and final phases. Those without experience in Alexander or Containment Bay S1T7 will need to pay especially close attention to positioning cues that may be unfamiliar during the final phase. Positioning of all players is crucial to your success in this fight, as several lethal AoE zones will be cast in quick succession that you may not be able to avoid with poor positioning. Unlike the previous encounter in The Aery, this fight has four phases that combine healer checks, DPS checks (DPS checks are where your party has to do enough damage within a specific amount of time or you will die), and raid mechanics (such as stacking to share damage).