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Darkest Dungeon 2, the sequel to the cult classic gameDarkest Dungeon, is designed in several acts called Confessions. Each Confession has Heroes traversing the world, culminating in facing a Confessional Boss at the Mountain. The Seething Sigh is the lung themed Confessional Boss for Resentment - the second act of the game.
Related:Darkest Dungeon 2: How To Beat The Dreaming GeneralTo beat Seething Sigh, players will have to manage the three total attack targets - the right lung, the left lung, and the Seething Sigh’s core. In this guide, we’ll provide tips on when to attack the core over the lungs, key mechanics for the fight, team composition, and helpful items.

The Seething Sigh
The Seething Sigh is a boss with three separate attack targets - the right lung, the left lung, and the core. In orderto win the fight, you will need to kill the core.However, ignoring the lungs entirely will allow the boss to use a devastating attack called Sundering Exhalation.
Many of this boss' attacks stackStress, but you might also seeBurn,Weakness, andBlindnesstokens being applied to your Heroes. The damage output of The Seething Sigh is not too difficult to tank, which is good because it is quite tanky itself.

DoTs are not very useful in this fight due to the boss' high resistance and the fact that neither the right nor left lung takes any turns on which to apply the DoT damage.
The Seething Sigh has seven total abilities. Each, apart from Sundering Exhalation, is focused on disrupting your ability to attack the lungs in a timely fashion.

Shallow Breath
+1 Inhale to one ally lung
Is used continuously until the core’s health is <70%, then it may be replaced with Deep Breath.
Deep Breath
+1 Inhale to both ally lungs
Available once the core’s health is <70%, then is used continuously once the core’s health is <30%.
Sundering Exhalation
10-20 Damage +2 Stress
Consumes Inhale Tokens
This skill always targets all Heroes Becomes empowered (dealing 10 extra damage and applying an additional Stress) if two Inhale tokens are present
Wrath and Rancor
2-4 Damage +2 Stress +3 Burn
Targets one Hero if both lungs are alive, but targets two if at least one lung is dead
Blind Rage
4-7 Damage +1 Blind +1 Combo/Poison
+1 Block(75%) +1 Blind (25%)
The combo token is only applied when the core’s health is ≤ 50%
4-7 Damage +1 Weakness +1 Stress Shuffle
Dying Light
4-6 Damage +2 Stress +3 Knockback -20 Flame +100% Damage
Requires a Combo/Poison token to use, which is consumed
Related:Darkest Dungeon 2: How To Unlock Every Hero
Preparing For The Seething Sigh
The Seething Sigh boss always appears predictably - they are located in the final area of the Resentment Confession known as The Mountain, and there will only be one encounter (Oblivion’s Rampart) before it. As such, players have the advantage of being able to prepare well in advance.
Seething Sigh requiresburst damageto manage properly - you’ll need to deal about 10-15 damage on a lung each round to prevent the boss' most devastating attack (in addition to whittling down the core). The Seething Sigh also pumps out Burn tokens and Stress in large numbers. Use inn items, combat items, and trinkets to buffon-hit damage, andspeed, as well asclear negative tokens and Stress.
The Best Inn Items To Fight The Seething Sigh
Inn items that are particularly useful against the Seething Sigh are those which:
Some examples of great items to use at the last inn include:
For more of thebest inn itemsin Darkest Dungeon 2, see our ranked list.
The Best Trinkets To Fight The Seething Sigh
You’ll also want to consider which trinkets you’ll equip for this boss. While your selection is generally limited by what you’ve found in each run, these are some stats to look out for:
For a list of some specific trinkets, check out our list ofthe best trinketsin Darkest Dungeon 2.
The Best Combat Items To Fight The Seething Sigh
For this Boss, you’ll want to prioritize Stress and token removal. Top items include:
For more combat items to look out for, see our list ofbest combat itemsin Darkest Dungeon 2.
Related:Darkest Dungeon 2: How To Build The Flagellant
Strategies For Fighting The Seething Sigh
After you’ve gotten your party all loaded up for this fight, you’ll still need to make the best decisions you can to win. First, let’s talk about the four jobs your Heroes will need to accomplish in this fight:
It’s generally advisable to assign each Hero in your party to one of these tasks. Heroes that can excel in one or more of these jobs might include:
For more about the Heroes of Darkest Dungeon 2, and what they excel at, see ourranked list of Heroes.