Open Wounds

Overview

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 set off against target's life regeneration (for monsters) or replenish life (for players). Instead, regeneration is immediately cut off once Open Wounds steps in (replenish life from items or skill, e.g. Prayer aura, still functions). Unlike Prevent Monster Heal the Open Wounds mod will also work on mercenaries.

Common abbreviation for Open Wounds is "OW".

Formula

The formula is different for different versions of the game. The amount of life loss increased drastically from V1.09 to V1.10, and was again slightly increased in V1.11b (the actual version of the game).

V1.11b

Total Life loss:

uLvl=1-15: 40 + (lvl - 1) * 9 * Modifier
uLvl=16-30: 40 + 126 + (lvl - 15) * 18 * Modifier
uLvl=31-45: 40 + 396 + (lvl - 30) * 27 * Modifier
uLvl=46-60: 40 + 801 + (lvl - 45) * 36 * Modifier
uLvl=61-99: 40 + 1341 + (lvl - 60) * 45 * Modifier

where Modifier differs for attack type and target:

0.25 for attacker using a Melee Attack on a Player.
0.125 for attacker using Ranged Attack on a Player.
0.5 for attacker using Ranged or Melee on a Boss Monster or minion.
1 for attacker using Ranged or Melee on any other target.

Life loss per second:

life loss per second = Total Life loss / 8

Life loss per frame:

Life loss per frame = Life loss per second / 25

where uLvl = unit level, can be player or hireling.

V1.10 and V1.11a

Life loss per frame:

Clvl=1-15: ((9 * Clvl+31) / 256)) * Modifier
Clvl=16-30: ((18 * Clvl-104) / 256) * Modifier
Clvl=31-45: ((27 * Clvl-374) / 256) * Modifier
Clvl=46-60: ((36 * Clvl-779) / 256) * Modifier
Clvl=61-99: ((45 * Clvl-1319) / 256) * Modifier

where Modifier differs for attack type and target:

0.25 for attacker using a Melee Attack on a Player.
0.125 for attacker using Ranged Attack on a Player.
0.5 for attacker using Ranged or Melee on a Boss Monster or minion.
1 for attacker using Ranged or Melee on any other target.

V1.09

In V1.09 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

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

V1.11b

Total Life loss
= 40 + 1341 + (85-60) * 45 * 1
= 40 + 1341 + 1125
= 2506

Life loss per second
= 2506 / 8
= 313.25

Life loss per frame
= 313.25 / 25
= 12.53

V1.10 and V1.11a

life loss per frame
= ((45 * 85 - 1319) / 256) * 1
= (3825 - 1319) / 256
= 9.7890625

For life loss per second, multiply life loss per frame by 25:

9.7890625 * 25
=244.7265625

For total life loss, multiply life loss per second by 8 (the total duration of OW):

244.7265625 * 8
= 1957.8125

V1.09

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

Items with Open Wounds mod

Item	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	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

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

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:

• Blade Fury
• Kicks in general
• Multishot (only the two middle arrows)
• Smite

Skills, that don't carry OW:

• Blade Sentinel
• Blade Shield
• Multishot (all arrows except for the two middle ones)

Is there a cap on OW?

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?

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

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

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.

How does OW from different item types stack?

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?

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?

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?

OW ignores any resistances and absorb and cuts off 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?

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

So what can I do against OW in PvP?

The duration of the state "openwounded" is subject to curse length reduction. So an Assassin's Fade can reduce the duration of OW, but only if cast before OW triggers. Note that Cleansing uses a different approach and won't reduce OW duration.

Will every target suffer from OW?

Kind of. The only time OW doesn't work is when a non-player target is in full health - meaning it'll only work on non-player targets if it is already in regeneration. So if you only deal physical damage on a monster that is Physical Immune, you won't trigger OW. In PvP however, hostile players will always suffer OW damage, regardless of their actual Hit Points.

Links

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