TheWoWDBLiberation of Undermine
The One-Armed Bandit Guide
The One-Armed Bandit 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 One-Armed Bandit assaults players while slowly gaining energy.
- Upon reaching 100 energy, it uses Spin to Win!
- Stages named in the Adventure Guide: Stage One: That's RNG, Baby!, Fabulous Prizes, Stage Two: This Game Is Rigged!.
- Tanks: The Big Hit inflicts high damage and leaves behind a Shocking Field.
- Healers: If two tokens are not deposited or a repeat combination is detected during Spin to Win!, the One-Armed Bandit uses Fraud Detected!.
- Damage dealers: Reel Assistants called forth from Spin To Win! bear icons that can be slotted back into the One-Armed Bandit.
Overview
Adventure Guide says
The One-Armed Bandit assaults players while slowly gaining energy. Upon reaching 100 energy, it uses Spin to Win! to call upon Reel Assistants bearing various symbol Tokens. Defeating these assistants and depositing their tokens within the One-Armed Bandit determines the result. After all of the valid combinations have been rolled, the One-Armed Bandit overloads and takes control of its own reels using Cheat to Win! in a final attempt to destroy its enemies.
- The Big Hit inflicts high damage and leaves behind a Shocking Field.
- Activating a Shock Coil causes Explosive Shrapnel to inflict high damage and absorb nearby Shocking Fields.
- If two tokens are not deposited or a repeat combination is detected during Spin to Win!, the One-Armed Bandit uses Fraud Detected!.
- Reel Assistants called forth from Spin To Win! bear icons that can be slotted back into the One-Armed Bandit.
- If two tokens are not deposited or a repeat combination is detected during Spin to Win!, the One-Armed Bandit uses Fraud Detected!.
- Standing close to the Pay-Line chip will grant High Roller!.
- If two tokens are not deposited or a repeat combination is detected during Spin to Win!, the One-Armed Bandit uses Fraud Detected!.
- Foul Exhaust reduces the movement speed of all players and absorbs a large amount of healing.
- Standing close to the Pay-Line chip will grant High Roller!.
Encounter phases
Adventure Guide says
- Stage One: That's RNG, Baby!
- Fabulous Prizes
- Stage Two: This Game Is Rigged!
Tank mechanics
Adventure Guide says
- The Big Hit inflicts high damage and leaves behind a Shocking Field.
- Activating a Shock Coil causes Explosive Shrapnel to inflict high damage and absorb nearby Shocking Fields.
- If two tokens are not deposited or a repeat combination is detected during Spin to Win!, the One-Armed Bandit uses Fraud Detected!.
Healer mechanics
Adventure Guide says
- If two tokens are not deposited or a repeat combination is detected during Spin to Win!, the One-Armed Bandit uses Fraud Detected!.
- Foul Exhaust reduces the movement speed of all players and absorbs a large amount of healing.
- Standing close to the Pay-Line chip will grant High Roller!.
DPS mechanics
Adventure Guide says
- Reel Assistants called forth from Spin To Win! bear icons that can be slotted back into the One-Armed Bandit.
- If two tokens are not deposited or a repeat combination is detected during Spin to Win!, the One-Armed Bandit uses Fraud Detected!.
- Standing close to the Pay-Line chip will grant High Roller!.
Boss abilities
| Ability | Adventure Guide | Notes |
|---|---|---|
 Spin To Win! | ||
 Fraud Detected! | ||
 Golden Ticket | ||
 Pay-Line | ||
 High Roller! | ||
 Crushed! | ||
 Up the Ante | ||
 Foul Exhaust | ||
 The Big Hit | In Mythic difficulty, The Big Hit also arcs lightning to extra players creating additional Shocking Fields. | |
 Shocking Field | ||
 Cheat to Win! | ||
 Linked Machines | ||
 Hot Hot Heat | ||
 Scattered Payout | ||
 Explosive Jackpot |
Loot
Every name is a TheWoWDB item page. Hover the row for the first-party tooltip.
Best-in-Slots
Bottom-Dollar Blouse
Coin-Operated Girdle
Dreadful Gilded Gallybux
Dubious Table-Runners
Gallagio Bottle Service
Giga Bank-Breaker
House of Cards
Hustler's Ante-Uppers
Miniature Roulette WheelMystic Gilded Gallybux
Operator's Fraud Detector
Random Number PerforatorVenerated Gilded GallybuxZenith Gilded GallybuxMounts, 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 The One-Armed Bandit?
The One-Armed Bandit assaults players while slowly gaining energy.
How many abilities does The One-Armed Bandit have?
The current datamine lists 15 named abilities on the The One-Armed Bandit encounter.
What does The One-Armed Bandit drop?
The Adventure Guide lists 15 drops. Each name links to its TheWoWDB item page. The full table also lives on the Liberation of Undermine database page.
Does The One-Armed Bandit 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 The One-Armed Bandit 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.