Lords of the Fallen

Harrower Dervla, the Pledged Knight

Boss in Lords of the Fallen, with its weaknesses and drops read from the game files.
Boss 6,800 HP Sunless Skein Weak to Pierce · Fire Datamined
Harrower Dervla, the Pledged Knight, boss in Lords of the Fallen

Lore

Remembrance of the Unbroken Promise

A pair of flower bracelets.

Hidden lore — revealed in game at high Inferno or Radiance

The boy had not seen another living being for some time when the fearsome Dark Crusader entered the chamber which was his prison. But eventually, in them he found something which he had seldom experienced before and never expected to again: solace.

Harrower Dervla's Rosary

A rosary once carried by Harrower Dervla of the Dark Crusaders.

Hidden lore — revealed in game at high Inferno or Radiance

Increasingly plagued by doubt and regret over her choices and the cause of the Dark Crusaders as a whole, Dervla felt lost and alone - until the day she descended to the base of Sunless Skein, and discovered purpose and companionship anew.

Harrower set

All Dark Crusaders are considered elite representatives of their faith, such is the strictness of their selection process and the prowess of successful aspirants, but even so, very few possess the almost unnatural skill necessary to achieve the prize martial rank of Harrower.

The game reveals this in play at high Inferno or Radiance.

Martyr's Shackles

The boy had not seen another living being for some time when the fearsome Dark Crusader entered the chamber which was his prison. But eventually, in her he found something which he had seldom experienced before and never expected to again: solace.

The game reveals this in play at high Inferno or Radiance.

Quoted from the item as the game writes it. Datamined

Damage absorption

Damage typeAbsorbsDefence
Physical 38.3% 375
Fire 29.3% 250
Holy 48.1% 560 Toughest
Wither 33.6% 305
Magic 13% 90 Weakest

Magic is spell damage. No weapon deals it — every spell does, whichever school it belongs to — so that row is how well casting works against this enemy, and the other four are what your weapon does.

Lowest absorption is where your damage goes furthest — magic here. The Defence column is the game's own stored value, on the same scale as an armour piece's absorption. The percentage is derived from it as K/(K+defence) with K = 604, a constant solved from three mitigations measured in game rather than read out of a table — so treat it as accurate to a few tenths, not exact.

The rest of this fight

You fight Dervla. The Martyr perches on her shoulders and enters in phase two, and the encounter carries a third stat block besides — the game files call it The Unbroken Promise.

  • Harrower Dervla, the Pledged Knight, boss in Lords of the Fallen Harrower Dervla
  • The Martyr, part of the Harrower Dervla, the Pledged Knight fight in Lords of the Fallen The Martyr · joins in phase two
  • The Unbroken Promise, part of the Harrower Dervla, the Pledged Knight fight in Lords of the Fallen The Unbroken Promise

The Martyr · joins in phase two

97,999 HP Resists Blunt, Pierce, Slash
Damage typeAbsorbs
Physical38.3%
Fire53.5%
Holy53.5%
Wither53.5%
Magic20.7%

The Unbroken Promise

10,500 HP Weak to Slash Resists Blunt
Damage typeAbsorbs
Physical38.3%
Fire43.2%
Holy53.5%
Wither48.1%
Magic13%

Immune to: backstab, frontstab, perfect-dodge slow, soulflay, stagger from behind.

How to hurt it

If you swing
Pierce · Fire 29.3% absorbed
If you cast
Magic 13% absorbed
Resists
Slash · Holy 48.1% absorbed

Both lines matter whichever way you play. The game gives you two hands for melee and a third slot for casting or a throwable, so most fights use both — and a cast has a wind-up that a crowd at close range will not wait through. Take the number for whatever is in your hand at the time.

Two different things in the swing lane, read together. Slash, blunt and pierce are tags — every weapon deals one of them, and they are not in the table above. The named school is from that table, and it is the lowest of the four a weapon can actually deal: magic is left out of it because no weapon deals magic.

What does not work

  • Perfect-dodge slow
  • Stagger from behind

These change the approach rather than the numbers. Immunity to Soulflay in particular means the Umbral opener you would normally lead with does nothing here.

Least effective: holy 48.1% absorbed · slash

Not a wall — it can be killed with any of these. At 48.1% absorbed you are giving up 35 percentage points against magic, which is the difference between a fight and a long fight.

Where you find Harrower Dervla, the Pledged Knight

Placed in Sunless Skein, and nowhere else in the game.

In order of how much of each region they cover. Datamined

Status resistance

StatusResistance
Bleed 1100
Poison 925
Frostbite 925
Smite 1325
Burn 775 Procs soonest
Ignite 925
Wither 200 Applies on hit

These are buildup thresholds, not percentages, so they read the opposite way to absorption — a lower number procs sooner. They are comparable between enemies but not against any other figure on the site. The proc itself is a damage event that scales off your own attributes, which is why two players see different numbers from the same status.

Wither sits outside that comparison. It applies on the hit rather than building toward a threshold, so its figure is not measuring the same thing as the other six and is left out of "procs soonest" — otherwise it would win on most enemies in the game and the tag would stop telling you anything.

Similar enemies

Also in Sunless Skein

Same faction

Its loot row carries no faction code at all, which is true of most bosses and of anything the game never sorted into one. Nothing is inferred from a missing one.

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