This is the compiled list of Ulduar raid debuffs. Please contribute anything that's missing. In particular, it may still be missing things from Hard Modes, so please point them out!

The numbers I'm using should be from Heroic Ulduar.

Flame Leviathan

• Battering Ram Increases damage taken by 50%. Stacks to 20.

Razorscale

• Stormstrike (Dark Rune Guardian) The next 2 sources of Nature damage dealt to the target are increased by 20%. Lasts 12 sec.
• Fuse Armor Reduces the armor, attack and movement speed of an enemy by 20% for 20 sec. Stacks to 5.

XT-002 Deconstructor

• Gravity Bomb Deals 19k to 21k after 9 seconds to the target and to anyone within 10 yards of him. Also pulls anyone nearby to the target after 9 seconds. (The actual range on the pull is unclear. It's definitely more than 10 yards on 10 man, but may only be 10 yards on 25 man. I'll have to test some more when we get some real attempts in Sunday.)
• Searing Light Deals 3500 damage per second to the target and anyone within 10 yards for 9 seconds.
• Sawblades (Trash) Deals upfront damage and 250 damage per second, stacks to 100.
• Cut Scrap Metal (Trash) 5600 fire damage per second for 4 seconds (channeled)

Ignis

• Unquenchable Flames (Trash) Engulfs a target in unquenchable flames, dealing 8% of their maximum health every 1 sec. for 5 sec, after which the flames will jump to another target. Only the cooling waters of Ignis's forge will extinguish this flame.
• Slag Pot Target is unable to attack the caster and takes 7500 Fire damage every second for 10 sec.
• Magma Splash (Trash) Minor damage/ac debuff stacked on the tanks. I think this was nerfed, it seemed nasty the first time we saw it but is hardly noticeable now.

The Iron Council

• Fusion Punch 18850 to 21150 Nature damage and an additional 15000 Nature damage per second for 4 seconds.
• Rune of Death 5000 shadow damage per half second.
• Static Disruption Deals 7000 Nature damage to enemies in an area and increases Nature damage taken by 75% for 20 sec.

Kologarn

• Crunch Armor Decreases armor by 25% for 45 seconds. Stacks to 4.
• Petrifying Breath (Not sure this will show on grid.) Inflicts 18750 to 21250 Nature damage every 1 sec. Lasts 4 seconds. Causes Brittle Skin.
• Brittle Skin Increases damage taken by 20% for 8 sec. Stacks to 99.
• Stone Grip Squeezes the life out of the target, stunning it and inflicting 5363 to 5637 Physical damage every 1 sec until Kologarn's Arm sustains 480,000 damage.
• Stone Nova inflicts 5550 to 6450 Physical damage within 10 yards. Increases damage taken by 5% for 10 sec. Stacks to 100.

Auriaya

• Sentinel Blast Inflicts 6000 shadow damage and increases shadow damage taken by 100%. Stacks 5 times.
• Terrifying Screech Raid-wide 5 second fear. Magic effect.
• Feral Pounce (Feral Defender) Stunned and takes 977 to 1128 shadow damage per second for 5 seconds.
• Savage Pounce (Sanctum Sentry) 7400 to 8600 Physical damage and 6013-6987 Physical damage every 1 sec for 5 sec.
• Rip Flesh (Sanctum Sentry) 4625 to 5375 Physical damage every 2 sec for 20 sec. Stacks up to 100 times. This is the primary source of damage on your tanks on the pull, once you deal with pounce.
• Guardian Swarm Focus This is cast on the target the Guardian Swarm will be attacking.

Freya

• Nature's Fury (Ancient Conservator) Inflict 5550 to 6450 Nature damage to its nearby allies every 2 sec. for 10 seconds.
• Conservator's Grip (Ancient Conservator) Silenced and pacified. This may be overkill to have up since large portions of the raid will have it at once.
• Impale (Elder Ironbranch) Stuns and inflicts 32375 to 37625 Physical damage every 1 sec for 5 sec.
• Iron Roots (Elder Ironbranch) Immobilizes and inflicts 7863 to 9137 Nature damage every 2 sec. until freed.
• Broken Bones (Elder Stonebark) Cannot Block, Dodge or Parry for 20 seconds.

Hodir

• Freeze Immobilizes target. Magic effect.
• Flash Freeze Encases the target in a block of ice.
• Biting Cold Deals increasing periodic damage. Movement diminishes this effect. (This may be overkill to show in something like grid.)

Thorim

• Deafening Thunder Spell casting times increased by 75%
• Unbalancing Strike Deals 200% weapon damage and decreases defense skill by 200.
• Impale (Gauntlet: Iron Ring Guard) Deals 1750 damage every 2 sec. for 1 min or until removed by healing the target past 90%.
• Mortal Strike (Pit: Dark Rune Champion) Deals 250% weapon damage and halves healing for 5 seconds.
• Rune Detonation (Gauntlet: Ancient Rune Giant) Immobilizes target for 4 seconds then deals 11250 to 13750 Fire damage to everyone within 15 yards.

Mimiron

• Napalm Shell Deals 9425 to 10575 Fire damage to target and anyone within 5 yards, then deals 6000 Fire damage per second for 8 seconds.
• Plasma Blast 30000 Spellfire damage per second for 6 seconds. (Used on tank in P1)
• Magnetic Field (Assault bots) Immobilized and takes 30% additional damage for 6 seconds. Magic effect.

General Vezax

• Mark of the Faceless Siphons 5000 health per second from enemies near target. Lasts 10 seconds.
• Shadow Crash Caster DPS buff that also reduces healing done by 75%
• Saronite Vapors Converts life into mana. Each stack causes the conversion to happen faster. Stacks to 99.

Yogg-Saron

• General
  • Insane Permanently under the control of Yogg-Saron. Increases damage done by 100% and health by 300%.
• Phase 1
  • Dark Volley (Guardian) Deals 8500 to 11500 damage to targets within 35 yards and reduces healing received by 25% for 10 seconds.
  • Dominate Mind (Guardian) Mind control for 10 seconds. Reduces sanity by 4%. Magic debuff.
  • Sara's Blessing Heals target then does 3000 shadow damage per second for 20 seconds.
  • Sara's Fervor Increases damage done by 20% and damage taken by 100%. Lasts 15 seconds.
• Phase 2
  • Brain Link (Sara) Links two targets. Targets take 3000 Shadow damage per second when they are more than 20 yards apart. Lasts 30 seconds.
  • Malady of the Mind (Sara) 5000 shadow damage and 4 second fear. Attempts to jump to a nearby friend when removed.
  • Lunatic Gaze (Inside) Unclear this will show up on grid. 1750 damage per second.
  • Squeeze (Constrictor Tentacle) Grabs target and deals 7500 damage per second until freed.
  • Curse of Doom (Corruptor Tentacle) 20000 Shadow damage infliected after 12 seconds. Curse debuff.
  • Apathy (Corruptor Tentacle) Reduces attack, cast and movement speed by 60% for 20 seconds. Magic debuff.
  • Black Plague (Corruptor Tentacle) Stuns target for 2 seconds every 3 seconds. Lasts 24 seconds. Disease debuff.
  • Black Plague (Corruptor Tentacle) 2 second stun. Disease debuff.
  • Draining Poison (Corruptor Tentacle) Deals 3500 damage every 3 seconds and drains 1400 mana every 3 seconds. Poison debuff.
• Phase 3
  • Drain Life (Immortal Guardians) Transfers 3333 health per second from the target to the caster. Lasts 5 seconds.
  • Lunatic Gaze (Yogg-Saron) Unclear if this will show up on grid. 5700-6300 shadow damage per second. lasts 4 seconds.

Algalon the Observor

• Phase Punch 8788 to 10212 damage and slowly fades the target to another plane of existence.

Updated the list with everything I could find. Suggestions or additions welcome.

Awesome list! I would sticky if it wasn't already stuck

Actually I do believe the latest grid update has all of these listed in its menu to actively select or deselect.

As of which version? Mine doesn't seem to have it and I updated.

I double checked and GridStatusRaidDebuff has a few of these but is missing many important ones still. I'm not sure where else you'd be seeing them from.

This is a great resource, thank you!

FWIW, X-perl has the option under the 'Raid' tab called 'Custom Highlights' which does the same thing as Grid.

You should be able to manually add any or all of these and it will display over your raid frames. Very useful.

Fusion Punch will show without you placing it in, it's a magic dot. Same with Terrifying Screech and Freeze.

You probably also want to add:

General Vezax:
Shadow Crash -- reduces healing output by 75% among other effects

Yogg-Saron:
Sara's Blessing -- shadow damage inflicted over time
Sara's Fury -- 100% increased damage taken

Thanks!

Added Shadow Crash, Sara's Blessing. I didn't see a Sara's Fury, but I did find a Sara's Fervor and Sara's Anger and added them.

Please let me know if they're both correct and in-game.

Ah you're probably right, it must be Sara's Fervor

You will definitely want to add 'Saronite Vapors' for General Vezax. It's the debuff applied when you stand in a green mana regen patch. Any more than about 6 ticks on someone and they'll probably die!

Added Saronite Vapors.

Thank you very much for this list. I often add in each of the debuffs to Grid and it makes things quite a bit easier to see who is being affected.

Added "Rip Flesh" and "Guardian Swarm Focus" to Auriaya. Seeing Rip Flesh was particularly helpful for surviving the first 30 seconds of the fight.

I am using Healbot and added Gravity Bomb and Light Bomb to the custom debuff. It works great and helped me healing those debuffed people.

However, Healbot can't track Kologram's Stone Grip. Anyone know why?


[edit] I got the answer for this (thanks Dunkamo). All you need to do is unchecking the "Ignore short duration debuff" option and Healbot will track Stone Grip properly.

I'm often on OT duty for Freya, and having a Hardened Bark indicator is pretty important for that. I don't know how Grid does its indicators - can it show conditionals like ">35 stacks" or similar? (I use PowerAuras on my focus target for this.)

I found having Static Disruption (http://www.wowhead.com/?spell=63494) show useful whilst working on Steelbreaker last Iron Council tonight.

Just to clarify, this spell is not cast on Raid members, but on the Guardians of Yogg Saron.

The other two "Sara's" spells are cast on the Raid.

Some additional ones that I've noticed:

Kologarn:
Stone Nova will show up as a debuff... helpful to know if your tank is going to need extra heals as it stacks.'

Hodir:
Biting Cold - stacking dot from Hodir's aura. If your raid frames show stacking debuffs this is nice to have to see who's not moving/might need extra heals. For grid I'm not sure how helpful it would be to show.
Flash Freeze - targets hit by flash freeze are encased in a block of ice and must be broken free

Thorim
Rune Detonation - (gauntlet: Ancient Rune Giant) - target is immobilized and will do aoe fire damage after 4 seconds to everyone in 15 yards.

A bunch from the Yogg Sarion encounter:

Insane (helpful to know who wasn't watching their sanity and needs to die now kthx)

Dark Volley - cast by the adds in phase 1, the -25% healing will show up as a debuff

Drain Life - random life drain from the adds in phase 3. Unlike some life drains, this is currently not a magic effect and is not dispellable.

From the corruptor tentacles, being applied to the raid throughout phase 2 and until the tentacles are all dead in phase 3. All are cleansable, and should be removed.
Curse of Doom - Curse.
Apathy - Magic.
Black Plague - Disease
----- Black Plague - the stun proccing from the above disease. Separate debuff. Cleansable as a separate disease.
Draining Poison - Poison

From the Constrictor Tentacles
Squeeze - Person grabbed by the tentacle and needs to be freed.

I do not use grid but Lunatic Gaze I do not believe leaves a noticeable debuff, as I cannot get it to show on my raid frames, which are pretty customizeable in the buff/debuff area. Sanity leaves a debuff but as it's applied to the whole raid I keep it blacklisted.