Aerborne

Expeditions / Field guide

Overworld expedition · Hard

Gloomforge Mines

A descent through five levels of the mine. Thin the galleries, walk down the Gullet, beat Overseer Grell, run the Mainline, break the Blastmaster on the Ore Line, bank the Round Foundry, and cross the black water to the Deep Foreman in the Gloomforge, the dwarven forge-palace cut into the far cliff. The Slag Hound waits off the Foundry if you want it.

Entry level
20Higher tiers may require more
Party size
1–5Players per private instance
Time limit
45 minComplete the run before time expires
Route
7 rooms5 boss encounters
Gloomforge Mines
Parchment floor plan of Gloomforge Mines, with its boss rooms shaded. Entrance The MainlineThe Round FoundryLift Station FireFoot of the GulletMiners' RestThe Last Dock 1Overseer Grell2The Blastmaster3Slag Hound4The Deep Foreman
  1. Overseer GrellGrell's Shaft
  2. The BlastmasterThe Ore Line
  3. Slag HoundThe Slag Pits · Optional
  4. The Deep ForemanThe Gloomforge

01 · Before you enter

Prepare your party

On a run-back tier nobody runs out of lives: if you fall, you come back at the last fire you lit, and if the whole party falls the fight resets. On tiers with shared lives, each death spends one. You keep your gear either way.

  • Enemy forces fill as you kill. The door to the Gloomforge stays barred until they reach 100%, so clear more than you strictly have to.
  • When a bell rings and sparks run down a rail, a cart is about two seconds behind them. Get off that track. On the Mainline, that means a refuge in the wall.
  • Carts hit anything on the rails. They kill the crews outright, and they stun a boss and take a slice of its health.
  • Light every fire you pass. If you fall in a fight, that's where you run back from, and everything you've killed stays dead.
  • The black water at the bottom won't kill you, but it stings on the way out.
  • The east drift off the first crosscut goes nowhere useful, which is why nobody ever found what's at the end of it.

Choose your difficulty

Open a tier for its requirements, modifiers and server records. Every party member must meet its entry requirements.

NormalLevel 20 · run back when you fall
Shared lives
None needed
Completion Marks
260
Server clears
2

No additional modifiers on this tier.

Fastest server clear27m 16s

maylia156, LiyahInsight, j0shCodes

/expedition start gloomforge_mines normal

Need a party? Use /expedition queue gloomforge_mines normal.

HeroicLevel 28 · run back when you fall

First clear this expedition on Normal.

Shared lives
None needed
Completion Marks
390
Server clears
0

No additional modifiers on this tier.

Fastest server clearNo clear recorded
/expedition start gloomforge_mines heroic

Need a party? Use /expedition queue gloomforge_mines heroic.

MythicLevel 36 · 3 shared lives

First clear this expedition on Heroic.

Shared lives
3
Completion Marks
650
Server clears
1
  • TimedFinish within the par time for an extra loot roll.
  • FortifiedRegular enemies have 30% more health and hit 15% harder.
Fastest server clearNo clear recorded
/expedition start gloomforge_mines mythic

Need a party? Use /expedition queue gloomforge_mines mythic.

02 · Room by room

Follow the route

  1. Grell's Shaft

    Boss

    Overseer Grell charges and cleaves, and the timber loads over his cave come down one at a time. Bait him under one for a free stun.

  2. The Mainline

    2 waves

    One long tunnel with rails down the middle. Fight down it, and dive into a refuge when the bell rings.

  3. The Ore Line

    Boss

    A rail yard. Carts cross it on seven tracks, faster as the fight goes on, and powder carts blow up at the end of the line. Lure the Blastmaster onto the rails.

  4. The Round Foundry

    2 waves

    Fight off the forge's thralls and pull the three damper levers to open the north door.

  5. The Slag Pits

    Optional boss

    Optional. The Slag Hound charges and leaps, slag runs across the floor, and rock falls from the roof.

  6. The Gloomforge

    Boss

    The Deep Foreman, in the great hall of a dwarven forge-palace older than the mine. Light the Last Dock's fire before you cross. See the boss briefing.

03 · Spoils

What the bosses leave

Every boss leaves a chest where it falls. Each of you opens it for a private share, rolled for you alone: materials, often a piece of the dungeon's gear, and a chance at something of that boss's own. The list below runs from the likeliest piece to the rarest.

Normal
35%chance of a boss's own piece
Heroic
47%chance of a boss's own piece, +6 item levels
Mythic
60%chance of a boss's own piece, +12 item levels
Boss · Grell's ShaftOverseer Grell6 pieces
  • Overseer's BracersWrists · item level 22

    Defense: +5

  • Tally-Keeper's GlovesHands · item level 22

    Defense: +3 · Bonus Damage: +2

  • Timberset GirdleWaist · item level 22

    Defense: +5

  • Overseer's AxeMain hand · item level 22

    Damage: +13

  • Overtime BandRing · item level 22

    Health: +5

  • Grell's Shift LedgerTrinket · item level 24

    Health: +5 · Damage Bonus: +3%

    Equipped: Grave Sight. You see in the dark.

Boss · The Ore LineThe Blastmaster7 pieces
  • Blaster's GogglesHead · item level 22

    Health: +5 · Defense: +5

  • Cartbreaker's ShouldersShoulders · item level 22

    Defense: +5

  • Powder-Stained MantleBack · item level 22

    Health: +6

  • Fuse-Cord BeltWaist · item level 22

    Defense: +4 · Bonus Damage: +2

  • Switchman's BootsFeet · item level 24

    Health: +6 · Defense: +7

    Equipped: Fleet Stride. You move faster.

  • Ore Line BellTrinket · item level 24

    Health: +4 · Damage Bonus: +3%

    Equipped: Last Stand. Below 30% health, you harden against hits for 5s. 60s cooldown.

  • The Blastmaster's RepeaterMain hand · item level 24

    Damage: +17

    On Hit: Ember Brand. Burns your target for 4s. 30% chance, 6s cooldown.

Optional boss · The Slag PitsSlag Hound5 pieces
  • Slagscale LeggingsLegs · item level 22

    Health: +5 · Defense: +8

  • Emberhide MantleShoulders · item level 22

    Defense: +5

  • Slag CollarNeck · item level 22

    Health: +6

  • Hound's Tooth BandRing · item level 22

    Bonus Damage: +2

  • Molten Heart-StoneTrinket · item level 24

    Health: +4 · Life Steal: +2%

    Equipped: Ember Aura. Enemies within 3 blocks burn.

Boss · The GloomforgeThe Deep Foreman7 pieces
  • Foreman's GauntletsHands · item level 24

    Defense: +5 · Bonus Damage: +2

  • Deep CollarNeck · item level 24

    Health: +7

  • Last Shift TreadsFeet · item level 24

    Health: +6 · Defense: +7

  • Gloomsteel BulwarkOff hand · item level 24

    Defense: +9

  • The Deep Foreman's CuirassChest · item level 26

    Health: +6 · Defense: +13

    Equipped: Last Stand. Below 30% health, you harden against hits for 5s. 60s cooldown.

  • Gloomforge SignetRing · item level 26

    Health: +6 · Damage Bonus: +3%

    Equipped: Ember Aura. Enemies within 3 blocks burn.

  • Deep Foreman's PickMain hand · item level 28

    Damage: +7 · Mining Power: +4 · Durability Protection: +12%

Gear for every slot

Set pieces can be found or forged. Found pieces turn up anywhere in the run: on enemies and in crates, chests and hidden caches.

Head
Gloomforged HelmSetBlaster's GogglesThe Blastmaster
Shoulders
Shift PauldronsFoundCartbreaker's ShouldersThe BlastmasterEmberhide MantleSlag Hound
Chest
Gloomforged PlateSetThe Deep Foreman's CuirassThe Deep Foreman
Back
Soot CloakFoundPowder-Stained MantleThe Blastmaster
Wrists
Ore CuffsFoundOverseer's BracersOverseer Grell
Hands
Prospector's MittsFoundTally-Keeper's GlovesOverseer GrellForeman's GauntletsThe Deep Foreman
Waist
Miner's ToolbeltFoundTimberset GirdleOverseer GrellFuse-Cord BeltThe Blastmaster
Legs
Gloomforged GreavesSetSlagscale LeggingsSlag Hound
Feet
Gloomforged BootsSetSwitchman's BootsThe BlastmasterLast Shift TreadsThe Deep Foreman
Neck
Lamp CordFoundSlag CollarSlag HoundDeep CollarThe Deep Foreman
Ring
Gloomsteel LoopFoundOvertime BandOverseer GrellHound's Tooth BandSlag HoundGloomforge SignetThe Deep Foreman
Trinket
Canary WhistleFoundGrell's Shift LedgerOverseer GrellOre Line BellThe BlastmasterMolten Heart-StoneSlag Hound
Main hand
Gloomforged PickSetOverseer's AxeOverseer GrellThe Blastmaster's RepeaterThe BlastmasterDeep Foreman's PickThe Deep Foreman
Off hand
Timbered BucklerFoundGloomsteel BulwarkThe Deep Foreman

04 · Bestiary

Enemies & possible drops

Health and damage are base values, before level, tier and party scaling. Drop chances apply to each player kill; they are separate from boss chests and completion rewards.

Boss · Grell's ShaftOverseer Grell420 HP · 9 damage
Possible drops per player kill
ItemAmountChance
Blasting Powder1–3100%
Foreman's Lampglow135%
Deep Foreman's Pick14%
Coin purse (Marks)75–125100%
Boss · The Ore LineThe Blastmaster480 HP · 6 damage
Possible drops per player kill
ItemAmountChance
Blasting Powder1–3100%
Foreman's Lampglow135%
Deep Foreman's Pick14%
Coin purse (Marks)75–125100%
Boss · The Slag PitsSlag Hound460 HP · 8 damage
Possible drops per player kill
ItemAmountChance
Blasting Powder1–3100%
Foreman's Lampglow135%
Deep Foreman's Pick14%
Coin purse (Marks)75–125100%
Boss · The GloomforgeThe Deep Foreman950 HP · 10 damage
Possible drops per player kill
ItemAmountChance
Blasting Powder1–3100%
Foreman's Lampglow135%
Deep Foreman's Pick14%
Coin purse (Marks)75–160100%
Enemy · Grell's Shaft, The Mainline, The Ore Line, Standing guardGloom Miner30 HP · 5 damage
Possible drops per player kill
ItemAmountChance
Gloomsteel Ore1–225%
A piece of gear (may be sealed)11.2%
Bottled Lesson11%
Coin purse (Marks)1–420%
Enemy · The Mainline, Standing guardPit Brute62 HP · 8 damage

Cleave: Winds up, then sweeps everything in front of it. Step behind or out of the arc.

Possible drops per player kill
ItemAmountChance
Gloomsteel Ore1–225%
A piece of gear (may be sealed)11.2%
Bottled Lesson11%
Coin purse (Marks)1–520%
Enemy · The Ore Line, Standing guardPowder Sapper30 HP · 5 damage

Barrage: Looses a volley of arrows at random players.

Possible drops per player kill
ItemAmountChance
Gloomsteel Ore1–225%
A piece of gear (may be sealed)11.2%
Bottled Lesson11%
Coin purse (Marks)1–420%
Enemy · The Round Foundry, The Gloomforge, Standing guardForge Thrall46 HP · 7 damage

Charge: Lowers its head, then rushes the farthest player in a line, knocking aside anyone in the way.

Possible drops per player kill
ItemAmountChance
Gloomsteel Ore1–225%
A piece of gear (may be sealed)11.2%
Bottled Lesson11%
Coin purse (Marks)1–420%
Enemy · The Round Foundry, The Gloomforge, Standing guardSoot Caster34 HP · 3 damage

Fire Pools: Marks the ground under each player; the marks burst into fire a moment later. Mend: Heals itself and wounded allies around it. A charged hit stops it.

Possible drops per player kill
ItemAmountChance
Gloomsteel Ore1–225%
A piece of gear (may be sealed)11.2%
Bottled Lesson11%
Coin purse (Marks)1–520%
Enemy · The Gloomforge, Standing guardDrowned Stoker48 HP · 7 damage

Charge: Lowers its head, then rushes the farthest player in a line, knocking aside anyone in the way.

Possible drops per player kill
ItemAmountChance
Gloomsteel Ore1–225%
A piece of gear (may be sealed)11.2%
Bottled Lesson11%
Coin purse (Marks)1–420%
Enemy · Standing guardCave Lurker16 HP · 4 damage

Leap: Leaps onto a far player and stuns everyone near the landing spot.

Possible drops per player kill
ItemAmountChance
Gloomsteel Ore1–225%
A piece of gear (may be sealed)11.2%
Bottled Lesson11%
Coin purse (Marks)1–420%

05 · Finish the expedition

What you take home

Players present at completion receive their own rewards. Enemy drops listed above are additional chances, not guaranteed completion items. Runs with hired allies do not earn campaign progress or set expedition records.

Base completion reward

260 Marks

Before the tier multiplier. Your tier settings can change this amount.

Fixed completion items

  • 12 × Raw iron
  • 6 × Raw gold
  • 1 × Diamond
  • 5 × Experience bottle

These items are separate from random loot rolls.

/expedition guide gloomforge_mines
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