Operation: Floodgate Guide (2025)

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Operation: Floodgate Guide

11.1 - Undermine(d)

Last Updated:February 26, 2025|Changelog

Welcome to the Operation: Floodgate Mythic+ guide for the World of Warcraft patch 11.1! This guide covers everything you need to know about your upcoming dungeon runs!

Route

Patch 11.1 - Undermine(d)

Operation: Floodgate

It is recommended to use the Mythic Dungeon Tools addon to look at your route and mobcount before the Mythic+ dungeon starts. Below you can see an example of a Weekly Route meant for +10 keys or lower. High Key Route will be added later into the season!

Simply import the route into the Mythic Dungeon Tool addon and take a look at it with your group.

Weekly Route

Operation: Floodgate Guide (1)
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High KeyMedium

Pug Medium

Uility neededVery Easy

Utility Needs

Patch 11.1 - Undermine(d)

Operation: Floodgate

Enrage

Bleed

Magic Dispel

  • Bloodthirsty Cackle
    • An Enrage effect that causes melee attacks of Darkfuse Hyenas to heal.
      • Interruptible.
  • Common utility examples:
    • Hunter
      • Tranquilizing Shot
    • Rogue
      • Shiv
    • Druid
      • Soothe
    • Evoker
      • Oppressing Roar with Overawe
    • Monk
      • Paralysis with Pressure Points
  • Harpoon
    • Bleed that is applied by a Venture Co. Diver.
      • Interruptible.
  • Nailgun
    • Root and a Bleed at the same time, inflicted by a Venture Co. Architect.
  • Common utility examples:
    • Evoker
      • Cauterizing Flame
    • Paladin
      • Blessing of Protection
  • Overcharge
    • A Magic debuff, inflicting nature damage for 12 seconds. If the effect presists without being dispelled, then the afflicted player is stunned for 5 seconds.
  • Common utility examples:
    • Priest
      • Mass Dispel
    • Warlock
      • Singe Magic

Big M.O.M.M.A. Trash Area

Patch 11.1 - Undermine(d)

Operation: Floodgate

Darkfuse Soldier

Mechadrone Sniper

Loaderbot

Darkfuse Demolitionist

Venture Co. Surveyor

Shreddinator 3000

Darkfuse Inspector

Darkfuse Hyena

Darkfuse Bloodwarper

Venture Co. Architect

  • Black Blood Wound
    • Melee attacks have a chance to apply a stacking Magic debuff, inflicting shadow damage every 2 seconds for 20 seconds.
Operation: Floodgate Guide (2)
  • Required Kick:
    • Trickshot
      • Inflicts shadow damage to a random player and cleaves the rest of the group.
  • Snipe
    • Inflicts physical damage to a random target.
Operation: Floodgate Guide (3)
  • Wind Up
    • Winds up and fixates a player, inflicting physical damage every 0.3 seconds to players within 3.5 yards for 6 seconds.
Operation: Floodgate Guide (4)
  • R.P.G.G.
    • Launches a volley of rockets, inflicting fire damage to players within 8 yards of impact.
Operation: Floodgate Guide (5)
  • Required Kick:
    • Surveying Beam
      • Venture Co. Surveyor focuses a superheated beam on a random player, inflicting fire damage every 0.2 seconds for 5 seconds.
        • The beam leaves behind a Surveyed Ground that inflicts fire damage every second to players standing within.
  • EZ-Thro Dynamite III
    • Inflicts fire damage to a random player.
Operation: Floodgate Guide (6)
  • Shreddation
    • Summons several spinning sawblades at the location of every player, inflicting physical damage every 0.3 seconds to players within the effect. This damage increases with consecutive hits.
      • Always start running by the end of a Shreddation cast, that way you will avoid all the damage from the ability.
  • Flamethrower
    • A frontal cone, inflicting fire damage to all players in front of the shredder every 0.2 seconds for 5 seconds.
Operation: Floodgate Guide (7)
  • Surprise Inspection
    • Shifts behind a random player and prepares a vicious inspection, inflicting shadow damage to all players in front of the caster.
Operation: Floodgate Guide (8)
  • Required Kick:
    • Bloodthirsty Cackle
      • Causes melee attacks of Darkfuse Hyenas within 20 yards to heal for 8 seconds.
        • This is an Enrage effect and thus can be soothed in case of a missed kick.
  • Pack Tactics
    • Increases the haste of Darkfuse Hyenas within 20 yards by 10%. This effect stacks.
Operation: Floodgate Guide (9)
  • Required Kick:
    • Blood Blast
      • Inflicts shadow damage to a tank.
  • Warp Blood
    • Inflicts shadow damage and applies a healing absorb every second for 6 seconds to every player within 60 yards.
Operation: Floodgate Guide (10)
  • Required Bleed Dispel:
    • Nailgun
      • Fires a nailgun at a random player, inflicting physical damage, causing him to Bleed and become rooted.
  • Rapid Construction
    • Venture Co. Architect rapidly constructs a tower and leaps to the top, gaining High Ground.
      • During High Ground, Architect has reduced damage taken by 90%.
Operation: Floodgate Guide (11)

Big M.O.M.M.A.

Patch 11.1 - Undermine(d)

Operation: Floodgate

Mobilize Mechadrones

Jumpstart

Electrocrush

Sonic Boom

Kill-o-Block Barrier

  • Big M.O.M.M.A. in Operation: Floodgate summons 4 Darkfuse Mechadrones to assist them in combat.
  • Darkfuse Mechadrones have a list of their own abilities that they will use during the encounter.
    • Maximum Distortion
      • The Mechadrone overloads its communications array, inflicting sonic damage to all players within 60 yards and pushing them away every 2 seconds for 14 seconds.
        • Interruptible.
    • Shoot
      • The Mechadrone fires a quick shot at a random player, inflicting physical damage.
    • Doom Storm
      • The Mechadrone unleashes a strafing run towards a random player, bombarding them in a straight line and inflicting nature damage to players within 3 yards of each impact.
Operation: Floodgate Guide (12)
  • Once all Darkfuse Mechadrones are defeated, Big M.O.M.M.A. attempts to jumpstart their depleted battery. This process causes it to take 200% increased damage and release jolts of energy every 1.5 seconds for 12 seconds. Each jolt of energy inflicts nature damage to all players.
  • Once their reserves are fully recharged, Big M.O.M.M.A. leaves behind Excessive Electrification, a ground effect inflicting nature damage every second to players standing within.
Operation: Floodgate Guide (13)
  • Big M.O.M.M.A. crushes the tank with an electrified claw, inflicting nature damage instantly and every second for 10 seconds.
Operation: Floodgate Guide (14)
  • Big M.O.M.M.A. in Operation: Floodgate blasts a pulse of sonic energy towards a random player which inflicts sonic damage every 0.5 seconds while dragging and silencing players within.
    • The pulse explodes upon colliding with an obstacle, inflicting sonic damage to players within 7 yards.
  • Get some distance from the boss to avoid getting silenced and dragged by the frontal but also not too close to any walls to also avoid getting hit by a second explosion.
Operation: Floodgate Guide (15)
  • Big M.O.M.M.A. surrounds themselves in an electric barrier, reducing all damage taken by -80%. While the shield is active, it inflicts nature damage to all players every 2.5 seconds.
    • Kill-o-Block Barrier is removed by killing all of the Darkfuse Mechadrones.
Operation: Floodgate Guide (16)

Demolition Duo Trash Area

Patch 11.1 - Undermine(d)

Operation: Floodgate

Venture Co. Surveyor

Shreddinator 3000

Venture Co. Architect

  • Required Kick:
    • Surveying Beam
      • Venture Co. Surveyor focuses a superheated beam on a random player, inflicting fire damage every 0.2 seconds for 5 seconds.
        • The beam leaves behind a Surveyed Ground that inflicts fire damage every second to players standing within.
  • EZ-Thro Dynamite III
    • Inflicts fire damage to a random player.
Operation: Floodgate Guide (17)
  • Shreddation
    • Summons several spinning sawblades at the location of every player, inflicting physical damage every 0.3 seconds to players within the effect. This damage increases with consecutive hits.
      • Always start running by the end of a Shreddation cast, that way you will avoid all the damage from the ability.
  • Flamethrower
    • A frontal cone, inflicting fire damage to all players in front of the shredder every 0.2 seconds for 5 seconds.
Operation: Floodgate Guide (18)
  • Required Bleed Dispel:
    • Nailgun
      • Fires a nailgun at a random player, inflicting physical damage, causing him to Bleed and become rooted.
  • Rapid Construction
    • Venture Co. Architect rapidly constructs a tower and leaps to the top, gaining High Ground.
      • During High Ground, Architect has reduced damage taken by 90%.
Operation: Floodgate Guide (19)

Demolition Duo

Patch 11.1 - Undermine(d)

Operation: Floodgate

During this encounter you are fighting 2 bosses, Keeza Quickfuse and Bront, at the same time. Both bosses have a unique set of abilities that interact with each other.

Once you defeat the Demolition Duo, make sure to always use the gun on the ground that is going to drop off the boss. Click on it and FIRE!!!, otherwise next boss area is going to be much harder with constant extra circles on the ground to dodge.

Big Bada BOOM!

B.B.B.F.G.

Quick Shot

Kinetic Explosive Gel

Barreling Charge

Wallop

Divided Duo

  • Keeza in Operation: Floodgate calls down a delivery of multiple Ticking Time Bombs. Ticking Time Bombs last for 30 seconds and cause Deflagration when they expire.
    • Deflagration is an explosion that inflicts deadly fire damage instantly and additionally every 2 seconds for 10 seconds to all players. This effect stacks.
  • Ticking Time Bombs explode when knocked into the air, raining down shrapnel that inflicts fire damage to players within 4 yards of impact.
    • Bombs can be knocked up into the air by cleaving them with Kinetic Explosive Gel or by aiming Barreling Charge into them.
Operation: Floodgate Guide (20)
  • Keeza in Operation: Floodgate unleashes her Blazing Ballistic Blunt Force Gun, spawning multiple frontal lines, inflicting fire damage to players caught in them and knocking them upwards.
Operation: Floodgate Guide (21)
  • Keeza in Operation: Floodgate fires a quick shot at a random player, inflicting physical damage.
Operation: Floodgate Guide (22)
  • Keeza applies a Magic debuff to a random player, inflicting fire damage every second.
    • Removing the gel causes it to erupt, inflicting fire damage to the player and knocking up all Ticking Time Bombs within 5 yards.
  • Don't be hasty with a dispel, always make sure that the targeted person is in a position to cleave a few bombs with the debuff removal.
Operation: Floodgate Guide (23)
  • Bront charges towards a random player, inflicting physical damage to any player in his way and stunning them for 2 seconds.
    • Brontalso knocks away any Ticking Time Bomb in his path.
  • Whenever Barreling Charge happens, Bront repeats it two more times in succession with the tank always being the last target for the charge.
    • That means that you should always prioritize aiming at the far bombs with the charges first and the close melee bombs should be handled by the last charge on a tank.
Operation: Floodgate Guide (24)
  • Bront wallops the tank, inflicting physical damage to him and physical damage to players within 5 yards of him while also knocking them up.
Operation: Floodgate Guide (25)
  • Defeating either Keeza or Bront causes the other to increase their damage done by 20% every 4 seconds. Bront also begins repeatedly Walloping his foes.
    • Always make sure to kill both bosses at the same time.

Swampface Trash Area

Patch 11.1 - Undermine(d)

Operation: Floodgate

Disturbed Kelp

Venture Co. Diver

Bombshell Crab

  • Required Kick:
    • Restorative Algae
      • Applies a healing Magic buff, restoring health every second for 15 seconds.
  • Jettison Kelp
    • Channels at a random player, inflicting nature damage every 0.5 seconds for 5 seconds.
Operation: Floodgate Guide (26)
  • Required Kick:
    • Harpoon
      • Grips a random player to the caster, inflicting physical damage and applying a Bleed.
        • Even though there can be multiple of Venture Co. Divers in the pack, only one of them can cast Harpoon at a time.
  • Plant Seaforium Charge
    • Spawns a mine on the ground that inflicts fire damage to any player within 6 yards and knocks them upwards.
Operation: Floodgate Guide (27)
  • Pinch
    • Pinches a tank, inflicting physical damage and slowing them by 10% for 10 seconds. This effect stacks.
  • Crabsplosion
    • On death, inflicts fire damage to players within 50 yards and applies a stacking fire damage over time effect.
Operation: Floodgate Guide (28)

Swampface

Patch 11.1 - Undermine(d)

Operation: Floodgate

Razorchoke Vines

Awaken the Swamp

Mudslide

Sludge Claws

  • Swampface in Operation: Floodgate entangles players together in pairs. The vines inflict nature damage every second for 24 seconds.
    • Moving 14 yards apart yanks players back together.
  • Before starting the fight, always decide together as a group how you want to deal with this mechanic. The recommended way to deal with it is for all players to stack up and always dodge to your left. This way there is going to be no confusion, and the boss becomes pretty trivial.
Operation: Floodgate Guide (29)
  • Swampface in Operation: Floodgate repeatedly smashes the ground every second for 4 seconds, inflicting nature damage to all players and causing Skewering Root to erupt from the riverbed.
    • Skewering Roots burst from below, inflicting nature damage to players within 5 yards as Rushing Tide flow outwards.
      • Rushing Tide is a wave of river water that inflicts frost damage every seconds to players within the effect and pushes them in its direction.
  • This is the hardest part of the encounter. Make sure to fully focus on dodging during it and don't panic. Even if you end up dodging the wave in different directions with your partner, there is enough distance for both of you to not get yanked during the dodge and get back together. Just stay calm and watch out for both blobs and your Vines partner.
Operation: Floodgate Guide (30)
  • Swampface upheaves massive amounts of mud in front of him, inflicting nature damage to any player hit.
Operation: Floodgate Guide (31)
  • Swampface ravages the tank with gruesome claws, inflicting physical damage and nature damage. The muddy gashes also apply a healing absorb.
Operation: Floodgate Guide (32)

Geezle Gigazap Trash Area

Patch 11.1 - Undermine(d)

Operation: Floodgate

Bubbles

Darkfuse Jumpstarter

Venture Co. Architect

Venture Co. Electrician

Darkfuse Inspector

Waterworks Bottomfeeder

  • Backwash
    • Inflicts frost damage to all players every second for 6 seconds.
  • Splish Splash
    • Frontal cone, inflicting frost damage to players within it.
  • Bubble Burp
    • Spawns bubbly bubbles at each players location, inflicting frost damage to any player that pops them.
  • Everybody should play in melee of Bubbles and spawn Bubble Burp in the same spot as a group. This way you can just move around Bubbles easily and dodge the Splish Splash frontal without any issues.
Operation: Floodgate Guide (33)
  • Sparkslam
    • Slams the tank, inflicting nature damage.
  • Battery Discharge
    • Spawns electric pools on the ground every 4 seconds, inflicting nature damage to players standing within them. Additionally, inflicts nature damage to all players within 60 yards.
Operation: Floodgate Guide (34)
  • Required Bleed Dispel:
    • Nailgun
      • Fires a nail gun at a random player, inflicting physical damage, causing him to Bleed and become rooted.
  • Rapid Construction
    • Venture Co. Architect rapidly constructs a tower and leaps to the top, gaining High Ground.
      • During High Ground, Architect has reduced damage taken by 90%.
Operation: Floodgate Guide (35)
  • Required Kick:
    • Lightning Bolt
      • Inflicts nature damage to a random player.
  • Required Magic Dispel:
    • Overcharge
      • Applies a Magic debuff, inflicting nature damage every 1.5 seconds for 12 seconds. If the effect persists without being dispelled, then the player is stunned for 5 seconds.
Operation: Floodgate Guide (36)
  • Surprise Inspection
    • Shifts behind a random player and prepares a vicious inspection, inflicting shadow damage to all players in front of the caster.
Operation: Floodgate Guide (37)
  • Vicious Bite
    • Inflicts physical damage to the tank and applies a stacking Bleed to him.
Operation: Floodgate Guide (38)

Geezle Gigazap

Patch 11.1 - Undermine(d)

Operation: Floodgate

Turbo Charge

Dam!

Leaping Sparks

Gigazap

Thunder Punch

  • Geezle siphons power from the generator into his battery pack, gaining 10 Electricity and emitting nature damage to all players every second for 10 seconds.
  • During this, beams of ultra death lightning emit from Geezle, inflicting nature damage and stunning any players hit for 1 second.
Operation: Floodgate Guide (39)
  • The dam structure shakes from the immense transfer of energy, causing water to leak and rubble to fall from above.
  • Water leaks from the cracks above, forming pools. Contact with electricity transforms the pool into Shock Water.
    • Shock Water inflicts nature damage and stuns any player inside for 4 seconds. Additionally, inflicts nature damage every second to players within the effect.
  • Chunks of rock break and fall from the ceiling, inflicting physical damage within 3 yards of each impact.
Operation: Floodgate Guide (40)
  • Geezle consumes 40 Electricity to galvanize several Leaping Sparks that fixate players.
    • Upon contact, the spark inflicts nature damage and stuns for 8 seconds.
  • Always be aware of when Leaping Sparks are going to happen and preposition yourself near a Dam Water pool. Once the Spark has appeared, simply lead it into the Water pool which will consume it.
    • Keep in mind that Dam Water pools don't do anything on their own and you can freely run through them, just make sure to not be in there whenever it gets electrified.
Operation: Floodgate Guide (41)
  • Geezle in Operation: Floodgate consumes 20 Electricity to shock random players with unlimited power, inflicting nature damage instantly and an additional nature damage every second for 8 seconds.
Operation: Floodgate Guide (42)
  • Geezle consumes 10 Electricity to sucker punch the tank with a jolting fist, knocking him back and inflicting physical damage instantly and nature damage every second for 4 seconds.
Operation: Floodgate Guide (43)

Lootpool

Patch 11.1 - Undermine(d)

Operation: Floodgate

Trinkets/Jewelry

Weapons

Armor

TypeItem
TrinketDarkfuse Medichopper
TrinketGigazap's Zap-Cap
TrinketImprovised Seaforium Pacemaker
TrinketRinging Ritual Mud
TypeItem
2-Hand SwordCircuit Breaker
PolearmGallytech Turbo-Tiller
DaggerGeezle's Coercive Volt-ohmmeter
WarglaivesSonic Ka-BOOM!-erang
GunKeeza's 'B.' B.B.B.F.G

ALL

TypeItem
BackElectrician's Siphoning Filter

Cloth

TypeItem
ChestSaboteur's Rubber Jacket
LegsRazorchoke Slacks
FeetNonconductive Kill-o-Socks

Leather

TypeItem
HeadWaterworks Filtration Mask
ShoulderMechanized Junkpads
WristDisturbed Kelp Wraps

Mail

TypeItem
ShoulderSkystreak's Hidden Missiles
ChestBront's Singed Blastcoat
WaistPortable Power Generator

Plate

TypeItem
ChestMuckdiver's Wading Plate
HandsJumpstarter's Scaffold-Scrapers
WaistVenture Contractor's Floodlight

Credits

Written By: Wexi

Reviewed By: Xerwo

Operation: Floodgate Guide (2025)

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