Uldir Boss Guides » Vectis Guide

Vectis is a boss in the Uldir raid in World of Warcraft. Our strategy guide will help you to defeat the Vectis encounter and the loot listing below contains all of the loot he drops on each difficulty.


Vectis is a fight consisting of two phases which alternate on a timer. This is a mostly single target encounter with occasional adds spawning.

Heroic Changes

  • The only Heroic change is a general increase in difficulty. There are no Heroic specific mechanics and abilities.

Strategy and Positioning

  • During Phase 1, the raid should be loosely spread on one side of the boss to make raid healing easier and removing the need to move with the Gestate dot.
  • Once players reach a few Lingering Infection stacks they should move to the other side of the boss to prevent further Omega Vectors from jumping to them.

  • Players should spread throughout the encounter area to make soaking Plague Bombs easier.
  • Keep a fair distance from the liquefied boss to make dodging Blood Geysers easier.

Strategies by Role

All Roles

  • Plague Bombs must be soaked by one player to prevent the spawn of an add.
  • Prioritize bouncing Omega Vectors to players with low stacks to limit the amount of damage.




Detailed Vectis Strategy Guide

Created by Crzypck, officer and Raid Leader of Mist on Area 52. This guide is geared towards Heroic and Mythic, with no details about Normal difficulty. If you have any questions, please feel free to ask!

Crzypck can be reached here on MMO-C, or on Discord at Crzypck#6309. If you find this guide helpful, feel free to throw him a follow on Twitch.

Also, special thanks to Limit, the World #2 and NA #1 guild, and specifically Tagzz for consulting on the Mythic strategies!

  • 2 Phase Encounter
  • There are two strategies for heroic listed. If your group is having serious problems handling Omega Vector, or keeping up with the healing requirement, it is highly recommend to use the alternate strategy.

Phase 1 - Revolves Around Debuff Management
  • Evolving Affliction
    • This is the Tank debuff, it applies one application every 10 seconds.
    • It deals a small amount of damage, but stacks infinitely.
    • It is a 12 second debuff.
    • As of this guide the damage is 20k initially, increasing by 20k damage each stack.
      • The damage is roughly 26k, 53k, 79k etc. on mythic.
  • Omega Vector
    • 10 second debuff on random players. This is the core mechanic of the fight.
      • This DoT duration and damage scale with raid size. Smaller raid sizes have a longer debuff that deals less damage.
    • Omega Vector is applied to 3 random players at the beginning of the encounter.
    • Upon expiring, it jumps to the closest raid member.
    • It leaves behind a debuff called Lingering Infection.
  • Lingering Infection
    • This increases nature damage taken by 5% per stack. All damage done Vectis is nature damage.
  • Contagion
    • This is a large AoE damage ability on the entire raid. It does 31k damage per person, modified by lingering infection.
  • Gestate
    • Gestate is applied to a random raid member. The target is briefly stunned and gets a 5 second DoT. Gestate also deals AoE damage to anyone within 5 yards of the stunned player.
    • Gestate damage, including the 5 yard AoE should be healed through.
    • Once Gestate ends, an add spawns at the targeted players location. Tanks must taunt this add.
      • This add casts Immunosuppression, which is a large healing absorb debuff on the raid. It can not be interrupted.
      • Healers need to heal through these absorbs.
      • DPS must focus and kill the add quickly, the add is always the priority target.

Phase 1 Strategy
  • The entire raid stacks behind the boss, with a raid marker 3 yards to the left.
  • When a player receives 5 stacks or more of Lingering Infection, they move to the marker to avoid Omega Vector bouncing to them.

Phase 1 Alternate Strategy (useful if you struggle with the above strategy)
  • Instead of grouping in one large pile, break the dps and healers into 3 separate groups with set stack points.
    • Players in each of the 3 groups need to be stacked tightly.
  • When Omega Vector is applied at the start of the encounter, the raid leader coordinates the debuffed players so that one Omega Vector is brought to each group.
  • The raid will only pass the Omega Vector between their assigned groups.
  • Benefits
    • This ensures no raider will ever receive multiple stacks of Omega Vector.
    • Makes the healing requirement slightly easier.
    • Spreads Lingering Infection stacks more evenly.

  • On a timer, the boss will liquify and become a puddle of blood, after a brief delay the puddle will quickly move to a different spot in the room.
    • Touching the puddle will cause you to gain a stack of Lingering Infection and take damage.
    • Once the liquified version of Vectis stops moving, it will expel Blood Geysers from the puddle toward a random raid member. These are fast moving lines that you must dodge.
      • If you are hit, you take damage and gain a stack of Lingering Infection.
    • Omega Vector continues jumping around during this phase, it is advised each group spreads in an area of the room together.
    • Plague Bomb
      • These are red circles on the ground. One person must soak each circle.
      • If the raid fails to soak a circle, an add spawns. This is the same type of add that Gestate spawns.
      • This can quickly cause a wipe, and all circles must be soaked.
    • The boss will always cast Liquify immediately after spawning a Gestate add, your goal is to kill it before having to soak puddles.
    • The boss will cast Plague Bombs two times per Liquify phase, then he begin phase 1 again.
    • Rinse and repeat!
    • The Liquify phase lasts 35 seconds.

Strategy For Second, Third, and Further Phase 1's
  • You raid should aim to have the Lingering Infection stacks to stay relatively even throughout the raid. Don't be afraid to move further away from your group if you have high stacks, to ensure Omega Vector does not bounce to you.
  • Always prioritize killing the add above boss dps.
  • Some guilds may find it easier to tank the boss wherever he re-appears after the Liquify phase. This slightly reduces down time on the boss, but will require you raid to re-adjust on the fly in terms of where they group up.

Mythic Vectis Abilities and Strategy Guide
  • 4 Omega Vectors are applied to the raid at the start of the encoutner instead of 3.
  • Damage in general is much higher, causing this fight to be a tight healing check.
    • The recommend raid composition for first kills is 2 Tanks, 5 Healers, and 13 DPS, slightly favoring ranged DPS over melee.
  • Contagion now has additional effects based on your number of Lingering Infection stacks a player has.
    • 6 stacks - Bursting Lesions
      • This deals an additional 24k damage and applies another stack of Lingering Infection to anyone within 5 yards of the player.
    • 12 Stacks - Spawn Parasite
      • This spawns a parasite add that will deal damage to random player. They should be killed quickly or crowd controlled.
      • If they reach full energy, they will release a large burst AoE to the entire raid, and apply one stack of Lingering Infection to everyone.
    • 25 stacks - Terminal Eruption
      • 66k damage happens to all players, plus 9.9 mil to the player with the 25 stacks. This is a wipe mechanic. You should never come anywher e near having 25 stacks.

Mythic Vectis Strategy
  • You must closely control stacks of Lingering Infection throughout the encounter. To properly manage the spread of Omega Vectors, you'll need to split the raid into 4 groups. At the beginning of the fight, the first 4 targets of Omega Vector need to stand in different groups and make sure each of the 4 groups has 1 Omega Vector bouncing between it.
  • When players get a 6th stack of Lingering Infection, they need to spread 5 yards from their assigned group shortly before each Contagion cast.
  • When a player gets to 12 stacks, DPS should be ready to deal with parasites via CC or by killing them.
  • You do not want to let players get to 12 stacks. If a player gets 11 stacks they need to leave their Omega Vector group to avoid receiving a 12th stack of Lingering Infection.
  • If anyone gets to 20+ stacks, something has gone horribly wrong, they should die and remain dead. This should never happen with proper execution.
  • Healing cooldowns will need to be organized around Contagion casts. Healers should prioritize direct healing on Omega Vector targets, and allow the cooldowns to carry most of the raid healing. A target effected by Omega Vector and Gestate needs raipd direct healing.
  • Contagion is cast at the following times during the encounter - 0:20, 0:45, 1:10, 1:36, 2:30, 2:55, 3:20, 3:46, 4:40, 5:05, 5:30, 5:56, 6:50, 7:15, 7:40.
  • There is little to no lethal damage outside Contagion and Omega Vector.
  • A two stack of Omega Vector is almost always a wipe. It's possible for the 2 stack to have staggered durations, in which case with some quick movement you can separate them. If a person with a 2 stack of Omega Vector dies, it's a wipe as the durations will bounce and sync, making them inseparable.
  • The add spawned by Gestate needs to be picked up by tanks asap, and focused by all DPS. If it gets two Immunosupression casts of, it will put great stress on the healers. Aim for only one Immunosupression cast per add.
  • In phase 2, assign quarters of the room to each group of 5 players. If you are the player with Omega Vector in your group, make sure the closest person to you is in your own group so the debuff bounces to the proper players.
  • Plague Bombs cannot be missed, and the lines the boss shoots must be dodged.

Mythic Kill Video
Thanks to Limit for the Mythic kill video!

Vectis Abilities

Originally Posted by MMO-Champion
The plague of corrupted blood killed countless trolls and began one of the most terrifying periods in Zandalar's history. The constructs within Uldir studied the disease in search of a cure, but found that only isolation and extermination was effective. Unfortunately, as the facility's safeguards cracked apart, the plague was accidentally combined with a sample of G'huun's blood, creating a new entity that hungered for fresh victims.

  • Overview - Vectis creates instances of Omega Vector which bounce endlessly between players during the encounter. When Omega Vector jumps between players it leaves behind a stack of Lingering Infection, which has no duration and cannot be removed. Vectis will create multiple instances of Omega Vector at the beginning of the encounter.


    On Mythic difficulty, (Contagion) will trigger additional effects based on the number of (Lingering Infection) stacks each player has.
    • Tanks -
    • Healers -
      • Targets afflicted by Omega Vector and Gestate will require heavy healing to survive.
      • Communicate with your allies to control hosts for Omega Vector.
      • Areas targeted by Plague Bomb that detonate without players inside them will spawn an addtional Plague Amalgam.
    • Damage Dealers -
      • Kill Plague Amalgams quickly to prevent excessive healing absorption from Immunosuppression.
      • Areas targeted by Plague Bomb that detonate without players inside them will spawn an addtional Plague Amalgam.
      • Avoid the area damage from targets affected by Gestate.
      • Communicate with your allies to control hosts for Omega Vector.
  • Omega Vector - Omega Vector takes root in a player, inflicting 6,070 Shadow damage every 2 sec for 10 sec.
    On expiration, Omega Vector jumps to the closest player and applies a stack of Lingering Infection to its former host.
    • Lingering Infection - Weakens the player's resistance to future infections, increasing Nature damage taken by 5%.
      • Bursting Lesions - Players with 6 stacks of Lingering Infection will gain Bursting Lesions whenever they are struck by Contagion.
        Bursting Lesions inflicts 15 Nature damage and applies a stack of Lingering Infection to nearby players within 0 yards every 1 sec for 3 sec.
      • Spawn Parasite - Players with 12 stacks of Lingering Infection will spawn an Engorged Parasite whenever they are struck by Contagion.
        Engorged Parasites will cast Parasitic Discharge when they reach full energy.
      • Terminal Eruption - Players with 25 stacks of Lingering Infection will suffer a Terminal Eruption whenever they are struck by Contagion.
        Terminal Eruption inflicts 40 Nature damage to all players and 6,005 Nature damage to the initially affected player.
    • Lingering Infection - Weakens the player's resistance to future infections, increasing Nature damage taken by 5%.
  • Stage One: Probing its Hosts -
    • Evolving Affliction - Inflicts 3,930 Nature damage every 2 sec for 12 sec.
    • Contagion - Inflicts 8,570 Nature damage to all players.
    • Gestate - Inflicts 16 Shadow damage every 2 sec to a random player and all players within 5 yards for 5 sec. Stuns the initial target while a Plague Amalgam gestates within the player.
      On expiration, the Plague Amalgam will spawn 5 yards from that player.
      • Plague Amalgam -
        • Immunosuppression - Spreads a toxin that absorbs 15 healing done to all players within 500 yards.
  • Stage Two: Spreading Pandemic -
    • Liquefy - Transforms into a pool of toxic blood, triggering Lingering Infection on players who come into contact with the pool.
      • Blood Geyser - A geyser of corrupted blood inflicts 19 Shadow damage and applies Lingering Infection to all players struck by the geyser.
    • Plague Bomb - Vectis launches a plague bomb, erupting after 8 sec. This eruption inflicts 17,900 Shadow damage instantly and 10 Shadow damage every 5 sec for 8 sec to all players within 6 yards.
      If no players are hit by the eruption, the bomb grows into a Plague Amalgam.


Mythic: VectisDefeat Vectis in Uldir on Mythic difficulty.
Now We Got Bad BloodDefeat Vectis in Uldir after infecting Warmother Rakkali with Plague Bomb on Normal difficulty or higher.

Vectis Loot List

Vectis drops item level 340 (LFR), 355 (Normal), 370 (Heroic), 385 (Mythic) loot. Loot can have higher item levels if it becomes Titanforged or Warforged.

Level Type Slot Name Model Viewer
Type Slot Name
340TrinketTrinketSyringe of Bloodborne Infirmity
340TrinketTrinketInoculating Extract
340BackBackPlasma-Spattered Greatcloak
340ClothWaistCord of Animated Contagion
340ClothHandsMutagenic Protofluid Handwraps
340LeatherHeadHood of Pestilent Ichor
340LeatherWristsWristwraps of Coursing Miasma
340MailLegsBlighted Anima Greaves
340PlateChestChestguard of Virulent Mutagens
340ShieldOff HandVector Deflector
340BowRangedBow of Virulent Infection
Level Type Slot Name Model Viewer
Type Slot Name
355TrinketTrinketSyringe of Bloodborne Infirmity
355TrinketTrinketInoculating Extract
355BackBackPlasma-Spattered Greatcloak
355ClothWaistCord of Animated Contagion
355ClothHandsMutagenic Protofluid Handwraps
355LeatherHeadHood of Pestilent Ichor
355LeatherWristsWristwraps of Coursing Miasma
355MailLegsBlighted Anima Greaves
355PlateChestChestguard of Virulent Mutagens
355ShieldOff HandVector Deflector
355BowRangedBow of Virulent Infection
Level Type Slot Name Model Viewer
Type Slot Name
370TrinketTrinketSyringe of Bloodborne Infirmity
370TrinketTrinketInoculating Extract
370BackBackPlasma-Spattered Greatcloak
370ClothWaistCord of Animated Contagion
370ClothHandsMutagenic Protofluid Handwraps
370LeatherHeadHood of Pestilent Ichor
370LeatherWristsWristwraps of Coursing Miasma
370MailLegsBlighted Anima Greaves
370PlateChestChestguard of Virulent Mutagens
370ShieldOff HandVector Deflector
370BowRangedBow of Virulent Infection
Level Type Slot Name Model Viewer
Type Slot Name
385TrinketTrinketSyringe of Bloodborne Infirmity
385TrinketTrinketInoculating Extract
385BackBackPlasma-Spattered Greatcloak
385ClothWaistCord of Animated Contagion
385ClothHandsMutagenic Protofluid Handwraps
385LeatherHeadHood of Pestilent Ichor
385LeatherWristsWristwraps of Coursing Miasma
385MailLegsBlighted Anima Greaves
385PlateChestChestguard of Virulent Mutagens
385ShieldOff HandVector Deflector
385BowRangedBow of Virulent Infection

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