The three dungeons in Last Epoch are one of the endgame features. You can repeatedly explore dungeons to get rewards. Each dungeon has a unique mechanic. Besides the regular experience and gold, you can also get unique items and even legendary items.
Players are advised to understand the mechanics and rewards of each dungeon before entering it.
Dungeon Mechanics
Each of the three dungeons in Last Epoch requires a different key to unlock, and each has a different mechanic.

Lightless Arbor
- Location: Ruined Era, Near The Surface Waypoint
- Key: Lightless Arbor Key
- Boss: The Mountain Beneath
- Mechanic: Burning Amber
- Main Element: Poison
- Reward system: Vault of Uncertain Fate
Lightless Arbor is a dungeon without natural light sources. You need to control Burning Amber as your light source to explore the dungeon. Any enemy outside of the light source will become very dangerous, so you should try to lure the enemy into the light source before fighting.
If your light source is exhausted, you can reactivate it by killing Amber Elemental.
Soulfire Bastion
- Location: Imperial Era, Near The Felled Wood Waypoint
- Key: Soulfire Bastion Key
- Boss: Fire Lich Cremorus
- Mechanic: Soulfire Souls and Soulfire Shield
- Main Element: Fire and Necrotic
- Reward system: Soul Gambler
The special mechanic of Soulfire Bastion is Soulfire Shield. Depending on the color of Soulfire Shield, it can resist Fire or Necrotic damage. You can use it to resist the boss’s skills, but each time you use Soulfire Shield, it will consume the souls you find in the dungeon.
Temporal Sanctum
- Location: Ruined Era, Near The Ruined Coast Waypoint
- Key: Temporal Sanctum Key
- Boss: Chronomancer Julra
- Mechanic: Temporal Shift
- Main Element: Poison and Void
- Reward system: Eternity Cache
The Temporal Sanctum mechanics are very interesting. You can switch back and forth between Ruined Era and Divine Era to avoid enemies, pass obstacles, and even boss attacks. But there are different enemies waiting for you in both eras, so don’t take it lightly.
Dungeon Key
You need the corresponding key to enter the three dungeons. As long as you have enough keys, you can challenge the dungeons repeatedly. Each key is equivalent to an extra health bar in the dungeon. Once you die while exploring the dungeon, you can choose to consume a key to revive on the spot. Therefore, it is recommended that you prepare a few keys in advance before challenging the dungeon.
If you are playing with other friends, only one of you needs to have the key to enter the dungeon, but if you die in the dungeon, you will be sent out of the dungeon and your friends can continue exploring. Here are some tips for challenging dungeons:
- Choose the right difficulty, and don’t choose a difficulty you can’t handle.
- Consider what rewards you need, and if you can’t handle the enemies or boss behind, it’s best to retreat in advance.
- Stay alert and focused in the dungeon.
- Avoid being surrounded by numerous small enemies.
- Adjust the corresponding resistance before entering the dungeon.
If you don’t want to explore the dungeon, you can also use Portal Charm to teleport you directly to the boss’ battle area.
Here are the three main ways to get dungeon keys:
- Monolith of Fate: The timeline boss of Monolith of Fate usually drops the dungeon key.
- Killing enemies: During the game, the key will randomly drop from the enemy, but the probability is not high.
- Arena of Champion: Arena of Champion will also drop the dungeon key, but the probability of the key appearing is also not high.
Dungeon Rewards
The rewards for the three dungeons vary greatly, and the final rewards will also change at different difficulties. The three bosses will drop different loot at different difficulties, and the higher the difficulty, the richer the loot dropped.
The Mountain Beneath:
- Tier 1+: Peak of the Mountain (Unique Helmet)
- Tier 2+: Foot of the Mountain (Unique Boots)
- Tier 3+: Face of the Mountain (Unique Shield)
- Tier 4+: Core of the Mountain (Unique Body)
After you defeat The Mountain Beneath, besides unique items, you will also be able to open the Vault of Uncertain Fate, where you can use Last Epoch Gold to get rewards. The more gold you have, the richer the rewards you can get.
Fire Lich Cremorus:
- Tier 1+: Ashes of Mortality (Unique Ring)
- Tier 2+: Lich’s Envy (Set Item Gloves)
- Tier 3+: Immolator’s Oblation (Unique Belt)
- Tier 4+: Pyre of Affliction (Unique Two-Handed Axe/Scythe)
After defeating Fire Lich Cremorus, you will encounter a Soul Gambler. You can gamble with him with your remaining souls. If you have enough souls, you can even take his entire cargo, but Soul Gambler does not accept gold.
Chronomancer Julra:
- Tier 1+: Julra’s Stardial (Unique Ring)
- Tier 2+: Somnia (Unique Helmet)
- Tier 3+: Julra’s Obsession (Unique Gloves)
- Tier 4+: Vessel of Strife (Unique Relic)
In addition to the regular experience and gold rewards, you also have the right to craft a legendary item once. You need to put in a unique item with legendary potential and an Exalted item of the same type with at least 1 unsealed affix.
This forging will transfer the affixes of the exalted item to the unique item with legendary potential. The greater the legendary potential, the more affixes will be transferred.
The above is a general introduction to the mechanisms and rewards of the three dungeons. The affixes of the three dungeons will change every day, making them always have a certain difficulty, so that players have the desire to challenge repeatedly, which is an excellent design.





