Open Wounds

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Open Wounds is a weapon mod which leads to a constant loss of life on the target hit over 8 seconds (200 frames). It's not actual damage the target receives, but a negative life regeneration, which is not offset against target's damage regeneration (for monsters, hirelings and pets). Instead, regeneration is immediately cut off once Open Wounds steps in (Replenish Life from items and healing from a skill like Prayer still function). Unlike Prevent Monster Heal the Open Wounds mod will also work when applied by a hireling or Iron Golem.

Common abbreviation for Open Wounds is "OW".


Formula[edit]

The formula is different depending on game version: life drain increased drastically in 1.10+.

1.10+[edit]

Life drain per frame in bits (1 bit = 1/256 point):


Clvl Life Drain
1-15 = 9*clvl + 31
16-30 = 18*clvl - 104
31-45 = 36*clvl - 374
46-60 = 36*clvl - 779
>60 = 45*clvl - 1319


This may then be modified against certain targets or when using certain attacks:


  • 0.25 (1/4) with any melee attack on a player
  • 0.125 (1/8) with any ranged attack on a player
  • 0.5 (1/2) with any melee or ranged attack on any Champion, Unique, Super Unique or boss (excluding normal or minion Putrid Defiler) monster
  • 1 with any melee or ranged attack on any other target


Life drain is rounded down to the nearest bit after division.


Life drain per second in points = Life drain * 25/256


Total life drain in points = Life drain * 199/256


Although duration is 8 seconds (200 frames), life does not drain in the first frame and so only does so for 199 frames.

1.09[edit]

Duration of OW was only 4 seconds and the same formula was used for all character levels. Also life loss wasn't influenced by a target modifier.

Life loss per frame:

(cLvl * 9 + 40) / 256

Life loss per second:

Life loss per second = Life loss per frame * 25

Total life loss:

Total life loss = Life loss per second * 4 (the duration of OW in V1.09)

Examples[edit]

For each version assume character level 85 and a normal monster as target.


1.10+[edit]

Life drain per frame in bits

= (45*85 - 1319) * 1

= (3825 - 1319)

= 2506


Life drain per second in points

= 2506*25/256

=244 186/256


Total life drain in points

= 2506 * 199/256

= 1,948 6/256

1.09[edit]

life loss per frame = (85 * 9 + 40) / 256
= (765 + 40) / 256
= 805 / 256
= 3.14453125

life loss per second = life loss per frame * 25
= 3.14453125 * 25
= 78.61328125

total life loss = life loss per second * 4
= 78.61328125 * 4
= 314.453125

Sources[edit]

Source OW%
Malice Melee Weapon 100%
Ripsaw Flamberge 80%
Fury Melee Weapon 66%
Goreshovel Broad Axe 60%
Kingslayer Sword/Axe

Steel Sword/Axe/Mace
Bloodmoon Elegant Blade
Fleshripper Fanged Knife
Razor's Edge Tomahawk
Swordback Hold Spiked Shield
The Gnasher Hand Axe
The Meat Scraper Lochaber Axe
Woestave Halberd

50%
The Impaler War Spear

Toothrow Sharktooth Armor

40%
Bloodthief Brandistock

Crow Caw Tigulated Mail

35%
Blood Crescent Scimitar

Cerebus' Bite Blood Spirit (Ladder Only)
Gut Siphon Demon Crossbow
Lacerator Winged Axe
Langer Briser Arbalest
The Scalper Francisca Duress body armor

33%
Riphook Razor Bow

Soul Harvest Scythe

30%
Um Rune (in weapon)

Beast Axe/Scepter/Hammer
Chaos Hand to Hand
Crescent Moon Axe/Sword/Polearm
Doom Axe/Polearm/Hammer
Bloodrise Morning Star
Boneflesh Plate Mail
Butcher's Pupil Cleaver
Dracul's Grasp Vampirebone Gloves
Fleshrender Barbed Club

25%
Infernal Tools (Complete) 20%
Skull Splitter Military Pick 15%
Gore Rider War Boots 10%
Crafted Blood Belt 5-10%


FAQ[edit]

Which skills/attacks carry OW and which don't?[edit]

In General, every 'attack' carries OW - i.e. bare fists attack, normal weapon attack and skills like Whirlwind, Zeal, Assassin's charge-up attacks and so on will deliver OW.

Skills, that carry OW:

Skills, that don't carry OW:

Is there a cap on OW?[edit]

No, there is no cap for OW. Thus the maximum is 100%. Rumours about OW (and other mods like Crushing Blow and Deadly Strike) being capped at 95% derive from the fact that the highest achievable Chance to Hit is 95%, meaning that you only can deliver OW on 95% of your strikes. Every time you hit though OW will trigger.

Does OW work on my mercenary?[edit]

Yes. Unlike Prevent Monster Heal, your mercenary can trigger OW on a target.

Can a target be subject to different OW causes at once?[edit]

No, it can't. If OW is triggered on a target already under the influence of OW, the timer will simply be reset to 8 seconds, regardless of level.

How does OW from different item types stack?[edit]

The chance to trigger OW is the sum of all items you carry. Only exception are dual-wielding barbarians and assassins: In this case, only the OW from the striking weapon plus OW from non-weapon items counts.

Does OW from another player/hireling override the 1st OW?[edit]

No. If another player or hireling hits a target that is under the influence of OW, the timer is reset to 8 seconds, but the life loss will still be that one calculated for the first player/hireling that hit it. That means, when your mercenary triggers OW on a monster which you already hit and triggered OW before, the timer will be reset to 8 seconds, but the monster will still receive the same damage it received from you triggering OW.

Is there a penalty for ranged attacks?[edit]

Yes, but only versus players. It's already mentioned in the formula above. The modifier is 1/2.

Can OW be countered by replenish life, physical resistance or absorb?[edit]

OW ignores any resistances and absorb and cuts off damage regeneration on the target if triggered. Replenish Life (e.g. from Prayer aura or Snakecord) still works though.

Is there a PvP penalty for OW?[edit]

As noted in the above formula, life loss in PvP is 1/4.

So what can I do against OW in PvP?[edit]

Life drain cannot be reduced by any form of damage reduction, and its duration cannot be reduced by Cleansing or Fade. Replenish Life from items is a direct counter. Against another player, a level 30 player in 1.10+ applies 109 bit life drain per frame with a melee attack, and 54 bit life drain per frame with a ranged attack: this can be countered entirely by Replenish Life +109 and +54 respectively.

Will every target suffer from OW?[edit]

Although always applied to another player, it only applies to non-player units (monsters, hirelings and pets) if their life value changes, either due to damage taken or regenerated. If no damage is taken then OW won't be applied if regeneration has already been stopped by Prevent Monster Heal, even if the target is at less than maximum life.


Links[edit]

Open Wounds calculator for V1.10+ (German)
Open Wounds calculator for V1.09 (German)
Open Wounds calculator for V1.09 (English)