Clearing the forward port ventilator on the way is practically a boss itself. At first, there will be three Teredo Moths and three Teredo Worms roaming around. A few plants called The Pagan's Knot will appear in the corridors between the round sections of the room. If left unattended, they will use Venom Burst and transform into The Pagan's Vine, and everyone will be inflicted with heavy poison. When this happens, the air can be cleared using circular pads in each large section to activate the fan, but the fans won't work for a while afterwards and will instead inflict lightning damage on anyone standing on them. When the worms and moths are almost defeated, three Ark Morbols will spawn. Deal with them like any other morbol and keep an eye on the knots until the room is clear. Strongly advised that each party split up to each of the three sections, such as A to the left, C to the right, and B to the middle, and take care of the knot to their right, making the knot at #1 priority. Irminsul & Sawtooth: The two monsters work in tandem, with Irminsul stuck in the middle, and Sawtooth connected to it by its tail. At any given time, one will be immune to ranged attacks, while the other will be immune to magic. Melee is always a valid option. Both must be tanked, as Irminsul is still capable of attacking despite its stationary appearance. Attack Name Description Mean Thrash Used by Sawtooth, inflicts damage and knockback in a large cone behind it. Feeding Time Occasionally the ground will bubble under a few players. Any players hit by this attack will be Devoured by Sawtooth, which will then transfer nourishment to Irminsul. This causes it to grow and gain damage stacks. Managing these stacks are the key to this fight, so avoid being devoured AT ALL COSTS. Mucus Bomb Target circular damage. If multiple players are hit by the same circle, tethers will stretch between them and inflict the Seized status, preventing all action. These tethers can be broken by other players running through them. Mucus Spray Like Mucus Bomb, but hits players near Sawtooth. Shockwave Stomp Both enemies will become invincible while Sawtooth charges this move. It will instantly slay anyone not hiding behind Irminsul. Pulse of the Void Irminsul will occasionally do this attack, hitting everyone nearby. Rootstorm Irminsul uses this shortly after Feeding Time. Inflicts heavy damage on the alliance and frees the devoured prey. Prey expelled in this manner will have the Unwilling Host debuff, causing them to run around outside of the player's control and attempt to pass it on to others via a melee range attack. Finally, Irminsul will spam this move if his development hits 100%, wiping the alliance. Ark Ked Adds summoned periodically during the fight. Very weak, but capable of being eaten during Feeding Time, so take them out ASAP. Advice and Tips It's exceptionally important to dodge out of Feeding Time's AoEs.

AoEs. When Sawtooth charges Shockwave Stomp , LoS him behind Irminsul.

, LoS him behind Irminsul. If you're a ranged or magical DPS, check to see which debuff is on which boss and make sure you're attacking the one with the opposite debuff so you aren't hurting yourself. Chest