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Fortified • Afflicted • Raging
As soon as you defeat the first boss of the dungeon, an NPC will spawn right from where you have entered the dungeon named Sindragosa. She will give you access to teleports throughout the instance, with the first one being after defeating Leymor, the second one to the left after defeating Azureblade, and the last one being just before heading down to the last boss, Umbrelskul.
Erratic Growth, else the player will be crowd-controlled into a sapling for 6 sec. Keep in mind that you can dispel it, but anyone within a few close yards of you will be transformed into a sapling (crowd-controlled), hence why you have to keep in distance in case of it.
Wild Eruption swirls on the ground. These deal damage, and leave behind a puddle of Infused Ground, which deals damage as you stand in it.
Mystic Vapors group-wide AoE damage-over-time effect interrupted on the Conjured Lasher at all times.
Shriek however possible using CCs before the cast finishes. Otherwise, it will pull all the mobs in the area around it, including those not already active in the dungeon. Be sure to pull the Whelp before you use any type of CC on it, or it will not do anything.
Ley-Line Sprouts are periodically spawned throughout the fight by Leymor. These must be destroyed using the other abilities throughout the fight, or your group will wipe out the groupwide damage done by Consuming Stomp. When a Sprout is destroyed, it spawns a Bubbling Sapling, the same oozelings you fought before the boss was activated. Explosive Brand is a knockback done by Leymor which leaves a circle on everyone in the group. When this circle expires, it will destroy any Sprouts inside of it.
Consuming Stomp is a groupwide damaging ability that will deal damage based on how many Sprouts are still alive in the room.
Arcane Bolt on tank, and a must-interrupt 
Waking Bane crowd control ability.
Heavy Tome casts on your tank, Unstable Curator will spawn 
Forbidden Knowledge ground swirls, of which you must avoid, else you will be disoriented for 4 seconds (or die if you are low health).
Icy Bindings is a groupwide root with a DoT component, cast by the Rune Seal Keeper. It should be kicked but can be dispelled. Any spare kicks should go on the 
Condensed Frost, a low-damage ability exclusively targeting your tank.
Piercing Shards, that is aimed by your tank.
Splintering Shards, which puts a circle around a target, causing them to bleed as well as deal damage to anyone inside their circle.
Summon Draconic Image summons a dragonkin around the room. This will shoot 
Illusionary Bolts at random group members and must be interrupted. Once you defeat them, they will trigger a second effect – 
Unstable Magic, dodge the ground swirlies!
Ancient Orb shoots an orb from the boss in a straight line to the edge of the room in any direction it chooses. You should dodge this as soon as it starts the channel.
Overwhelming Energy causes the boss to run to the centre. It will spawn 4 Draconic Images which channel on the boss, making it immune to damage. You must kill the four images to continue the boss fight. While this is going on, the boss is also spawning 5 Ancient Orbs at a time in a pentagon pattern and shooting them to the edges of the room. These must be dodged the same as the big ones during the main phase of the fight.
Shoulder Slam targets a random player and charges at them, dealing physical damage. In addition, they also have 
Bestial Roar which deals heavy group AoE damage.
Null Stomp is the only ability you should focus on, although it prefers to “jump” on Ranged players, it can be deadly for the whole group if multiple of those mobs are pulled. Watch out!
Vault Rune somewhere on the floor.
Absolute Zero will cause the boss to teleport to the centre of the room and begin a channel. The group must make their way to the safety of a Vault Rune somewhere on the floor, indicated by a blue bubble. During Absolute Zero, the boss will take 99% reduced damage, so your whole focus is on surviving rather than min-maxing damage.
Icy Devastator. Dropping combat abilities can also work (e.g. 
Shadowmeld, 
Vanish, 
Invisibility, 
Feign Death and such).
Crystalline Roar frontal. Crystalline Roar frontal, it targets a random player. Unleashed Destruction is a large amount of groupwide damage that comes out somewhat frequently. It should be mitigated when possible. Fracture cast, which will leave a massive DoT on the party and likely wipe you. Arcane Eruption happens whenever the boss reaches 100 energy. It causes 
Crackling Vortexs to spawn around the room, which slowly moves towards players.
