TheWoWDBLiberation of Undermine
Vexie and the Geargrinders Guide
Vexie and the Geargrinders in Liberation of Undermine, quoted from the Adventure Guide. Database holds the raw abilities and the full loot table.
30-second TL;DR
Adventure Guide says
- The Geargrinder begins the encounter encased in Protective Plating, slowly generating energy in preparation for Unrelenting CAR-nage.
- While atop her war-tank, Vexie calls in Geargrinder Bikers to assist her.
- Stages named in the Adventure Guide: Stage One: Fury Road, Stage Two: Pit Stop.
- Tanks: Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
- Healers: Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
- Damage dealers: Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
Overview
Adventure Guide says
The Geargrinder begins the encounter encased in Protective Plating, slowly generating energy in preparation for Unrelenting CAR-nage. While atop her war-tank, Vexie calls in Geargrinder Bikers to assist her. When a biker is defeated they surrender their ride, allowing players to unleash a Blaze of Glory and removing an application of Protective Plating. Once all Protective Plating is removed, the Geargrinder suffers a Mechanical Breakdown. While broken down, Vexie begins to Tune-Up the war-tank and calls Pit Mechanics to Repair the Geargrinder. Once fully repaired Vexie commands the Geargrinder to continue its assault!
- Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
- Vexie's Tune-Up and Pit Mechanics' Repair the Geargrinder's Protective Plating.
- Tank Buster leaves an Oil Slick at the caster's location.
- Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
- Vexie's Tune-Up and Pit Mechanics' Repair the Geargrinder's Protective Plating.
- Mechanical Breakdown causes the Geargrinder to take increased damage.
- Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
- Spew Oil inflicts moderate damage to afflicted players.
- While the Geargrinder suffers from a Mechanical Breakdown all players take damage from Backfire.
- Mechanical Breakdown causes the Geargrinder to take increased damage.
Encounter phases
Adventure Guide says
- Stage One: Fury Road
- Stage Two: Pit Stop
Tank mechanics
Adventure Guide says
- Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
- Vexie's Tune-Up and Pit Mechanics' Repair the Geargrinder's Protective Plating.
- Tank Buster leaves an Oil Slick at the caster's location.
Healer mechanics
Adventure Guide says
- Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
- Spew Oil inflicts moderate damage to afflicted players.
- While the Geargrinder suffers from a Mechanical Breakdown all players take damage from Backfire.
- Mechanical Breakdown causes the Geargrinder to take increased damage.
DPS mechanics
Adventure Guide says
- Defeated Geargrinder Bikers surrender their bikes, allowing for Blaze of Glory.
- Vexie's Tune-Up and Pit Mechanics' Repair the Geargrinder's Protective Plating.
- Mechanical Breakdown causes the Geargrinder to take increased damage.
Boss abilities
| Ability | Adventure Guide | Notes |
|---|---|---|
 Protective Plating | ||
 Unrelenting CAR-nage | ||
 Call Bikers | ||
 Spew Oil | In Heroic and Mythic difficulties, Spew Oil leaves behind an Oil Slick. | |
 Incendiary Fire | ||
 Bomb Voyage! | ||
 Tank Buster | In Heroic and Mythic difficulties, Tank Buster leaves behind an Oil Slick. | |
 Mechanical Breakdown | ||
 Tune-Up |
Loot
Every name is a TheWoWDB item page. Hover the row for the first-party tooltip.
Mounts, toys, achievements, transmog
Only rows the journal loot table or an achievement title can prove for this encounter.
Mounts
Prototype A.S.M.R. · The Big G
Toys
Achievements
Heroic: Liberation of Undermine · Liberation of Undermine · Mythic: Cauldron of Carnage · Mythic: Chrome King Gallywix · Mythic: Liberation of Undermine · Mythic: Mug'Zee, Heads of Security · Mythic: Rik Reverb · Mythic: Sprocketmonger Lockenstock · Mythic: Stix Bunkjunker · Mythic: The One-Armed Bandit · Mythic: Vexie and the Geargrinders
Entrance and instance
Liberation of Undermine is a raid in the Adventure Guide. See the Liberation of Undermine database page for the raw journal, map, and loot grid. This guide does not invent coordinates or a walking path.
Related bosses
Player strategy
This page quotes the Adventure Guide. It does not add player strategy such as positioning, assignments, stack or spread calls, or cooldown timings unless that sentence is already in the journal.
Questions
What does the Adventure Guide say about Vexie and the Geargrinders?
The Geargrinder begins the encounter encased in Protective Plating, slowly generating energy in preparation for Unrelenting CAR-nage.
How many abilities does Vexie and the Geargrinders have?
The current datamine lists 9 named abilities on the Vexie and the Geargrinders encounter.
What does Vexie and the Geargrinders drop?
The Adventure Guide lists 14 drops. Each name links to its TheWoWDB item page. The full table also lives on the Liberation of Undermine database page.
Does Vexie and the Geargrinders change on Heroic or Mythic?
The current Adventure Guide text for this encounter does not include separate Heroic or Mythic sentences we can quote. If a later client build adds them, they appear here automatically.
Does Vexie and the Geargrinders drop a mount?
The journal loot table includes Prototype A.S.M.R., The Big G. Each links to its TheWoWDB mount page.
Where does this guide's text come from?
Quoted Adventure Guide sections come from TheWoWDB's retail datamine (client build 12.1.0.69587, ingested 2026-09-01). Player strategy such as positioning, assignments, and cooldown timings is omitted unless that sentence is already in the journal.
Source and build
This page quotes the Adventure Guide. It does not add player strategy such as positioning, assignments, stack or spread calls, or cooldown timings unless that sentence is already in the journal. Quoted sections come from TheWoWDB Adventure Guide datamine (client build 12.1.0.69587, ingested 2026-09-01). Ability names link to first-party spell pages. When a newer retail build is ingested, this page updates with it.