Emerald Nightmare - Dragons of Nightmare

The Emerald Dream was entrusted to Ysera for safekeeping, and the mightiest of her green dragon brood were assigned to stand watch over four portals that connected directly to Azeroth. But even before the Cataclysm, these dragons began to show signs of corruption. Now, the path to the Nightmare's core runs through the dragons' lair.

• Overview - Ysondre shares health with Emeriss, Lethon, and Taerar. She begins the fight alongside the nightmare of one of her former cohorts. When Ysondre reaches 70% health remaining, the nightmare takes to the skies and a new one emerges from a nearby portal. Upon reaching 40% health remaining, the nightmare dragon in the air lands and the one on the ground takes to the air. In Mythic difficulty, Ysondre is accompanied by Emeriss, Lethon, and Taerar at all times.
  
  • Damage Dealers -
    • Be sure to switch targets to prevent Slumbering Nightmare from triggering.
    • Try not to stand directly behind the dragons so as to not be struck by Tail Lash.
    • Stand within the Nightmare Bloom to prevent Dread Horrors from spawning.
  • Healers -
    • Be sure to switch targets to prevent Slumbering Nightmare from triggering.
    • Quickly dispel Defiled Vines from allies so that they can escape the resulting Defiled Eruption.
    • Stand within the Nightmare Bloom to prevent Dread Horrors from spawning.
  • Tanks -
    • Be sure to switch targets to prevent Slumbering Nightmare from triggering.
    • Face the dragons away allies so they don't get hit by Corrupted Breath.
• Shared Abilities - Ysondre and the nightmare of each of her cohorts share the following abilities on the ground.
  
  • Mark of the Nightmare -
    
    • Mark of Ysondre - Ysondre periodically marks all players within 60 yds, inflicting 4,858 Shadow damage every 1 sec for 35 sec. Upon reaching 10 stacks, the target is afflicted with Slumbering Nightmare and stunned for 30 sec.
    • Mark of Emeriss - Emeriss periodically marks all players within 60 yds, inflicting 4,858 Shadow damage every 1 sec for 35 sec. Upon reaching 10 stacks, the target is afflicted with Slumbering Nightmare and stunned for 30 sec.
    • Mark of Lethon - Lethon periodically marks all players within 60 yds, inflicting 4,858 Shadow damage every 1 sec for 35 sec. Upon reaching 10 stacks, the target is afflicted with Slumbering Nightmare and stunned for 30 sec.
    • Mark of Taerar - Taerar periodically marks all players within 60 yds, inflicting 4,858 Shadow damage every 1 sec for 35 sec. Upon reaching 10 stacks, the target is afflicted with Slumbering Nightmare and stunned for 30 sec.
    • Slumbering Nightmare - Traps a player in a deep nightmare, stunning the target for 30 sec. This effect only occurs on players reaching 10 stacks of a particular mark of nightmare.
  • Corrupted Breath - Breathes out corruption in a frontal spray, inflicting 708,300 Plague damage to players within 45 yds.
  • Tail Lash - Inflicts 510,000 Physical damage to players behind the caster, knocking them back.
• Ysondre - Ysondre shares health with Emeriss, Lethon, and Taerar.
  
  • Nightmare Blast - Launches a ball of nightmare essence, inflicting 321,000 Shadow damage to players struck and knocking them back. This creates a Nightmare Bloom for 60 sec.
    
    • Nightmare Bloom - Every 3 sec, inflicts 139,776 Shadow damage to players standing within the Nightmare Bloom. If no players stand upon the bloom, instead it periodically releases a Dread Horror.
    • Dread Horror - An amalgam of nightmare fuel, this horror seeks out life to devour.
      
      • Wasting Dread - Players within 5 yds of the Dread Horror have their damage done reduced by 50%.
      • Unrelenting - Periodically increases movement speed by 20% and damage done by 10%.
  • Call Defiled Spirit - Calls forth a defiled druid spirit from the nightmare, which roots players and then detonates.
    
    • Defiled Vines - Defiled roots snake out of the ground, immobilizing all players within 10 yds.
    • Defiled Eruption - The defiled spirit explodes, inflicting 793,200 Shadow damage to players within 10 yds.
• Emeriss -
  
  • Volatile Infection - An infection burns within the target, inflicting 110,080 Nature damage to the target and all players within 10 yds every 3 sec for 1.5 min.
    Emeriss uses this ability while grounded.
  • Essence of Corruption - Essences of corruption periodically spawn around Emeriss.
    Emeriss uses this ability while grounded.
    
    • Essence of Corruption -
      
      • Corruption - Corruption bursts forth, inflicting 165,984 Shadow damage to all players.
  • Corruption of the Dream - Emeriss corrupts the dream around herself, infecting her allies. Any time one of her allies perishes, a corrupted mushroom spawns from its corpse.
    Emeriss uses this ability while flying.
    
    • Corrupted Burst - When a corrupted mushroom explodes, it inflicts 573,000 Nature damage to all nearby players.
• Lethon -
  
  • Siphon Spirit - Lethon pulls a soul fragment out of players, drawing them in towards himself. When the spirit reaches Lethon, it heals both him and Ysondre for 6,552,000 health.
    Lethon uses this ability while grounded.
    
    • Unrelenting - Periodically increases movement speed by 20% and damage done by 10%.
  • Gloom - Lethon causes nightmares to periodically fall from above, inflicting 340,224 Shadow damage to players within 10 yds of the impact area.
    Lethon uses this ability while grounded.
  • Shadow Burst - Targets a player for a burst of energy. After 10 sec, shadow magic spreads to the three players nearest to that target, inflicting 58,368 Shadow damage every 3 sec and reducing movement speed by 5% for 21 sec. This effect stacks.
    Lethon uses this ability while flying.
• Taerar -
  
  • Shades of Taerar - Taerar splits his essence into two images of himself. These images have less health and do less damage, but share some of his same abilities.
    Taerar uses this ability while grounded.
    
    • Shade of Taerar -
      
      • Corrupted Breath - Breathes out corruption in a frontal spray, inflicting 392,080 Plague damage to players within 45 yds.
  • Seeping Fog - Nightmare fog seeps out from Taerar. If a player comes into contact with the fog, that player is put to sleep for 6 sec and suffers 114,400 Nature damage every 1 sec for the duration.
    Taerar uses this ability while grounded.
  • Bellowing Roar - Taerar releases a mighty dragon roar, causing all players to run in fear for 3 sec.
    Taerar uses this ability while flying.
• Lumbering Mindgorger - At 90%, 60%, and 30% health remaining, a Lumbering Mindgorger coalesces to devour the thoughts of all players.
  
  • Crimson Moon - Periodically inflicts 269,685 Shadow damage to all players within 60 yds.
  • Collapsing Nightmare - Reality comes crashing down, inflicting 455,000 Shadow damage to players within 5 yds of the explosion and reducing their damage done by 50% for 9 sec.
  • Devour Nightmare - Upon reaching full energy, the Lumbering Mindgorger begins to devour the minds of all players, killing them.