Note: We'll continue updating our Forbidden Sanctum guide throughout the league as more is discovered about the mechanic.
There are many types of rooms in the Sanctum each of which serve their own purpose, the current rooms to consider are:
Relics are a permanent form of power progression within the Forbidden Sanctum. As you progress through the league you will unlock slots on your relic altar that you can fill with relics you find. Relics on your altar will grant their effects to you on your sanctum runs, there are 3 sizes of relics each of which have their own modifier pools.
Small Relics (2x1)
- +x To Maximum Resolve (Prefix)
- Gain x aureus coins at the start of the sanctum (Prefix)
- Gain x Inspiration at the start of the sanctum (Prefix)
- Monsters have x% chance to drop double Aureus Coins (Suffix)
- Chests have x% chance to drop double Aureus Coins (Suffix)
- Gain x resolve when you kill a boss (Suffix)
- x additional rooms are revealed on the sanctum map (suffix)
Medium Relics (3x1)
- x% increased resolve recovered (Prefix)
- Gain x Inspiration at the start of each floor (Prefix)
- Guards take x% increased damage (Prefix)
- Bosses take x% increased damage (Prefix)
- The merchant has x additional choices (Prefix)
- x% reduced merchant prices (Suffix)
- x aureus coins when you complete a room (Suffix)
- Recover x resolve when you complete a room (Suffix)
- Gain x resolve when you use a fountain (Suffix)
- Guards impact x% reduced resolve (Suffix)
- Bosses impact x% reduced resolve (Suffix)
Large Relics (2x2)(4x1)
- Gain x Inspiration when you receive an affliction (Prefix)
- x% increased maximum resolve (Prefix)
- Monsters take x% increased damage (Prefix)
- Gain x maximum resolve when you kill a boss (Suffix)
- Gain x maximum resolve when you use a fountain (Suffix)
- x% chance to avoid gaining an affliction (Suffix)
- Monsters impact x% reduced resolve (Suffix)
You may have multiple relics on your bench and their effects stack additively. Having a good relic loadout is essential for farming the Forbidden Sanctum efficiently.
You will gain access to 1 additional Forbidden Sanctum room per Campaign Zone or Atlas Map that you complete, so farming smaller/shorter Maps are ideal for stacking up a full Sanctum floor to run all at once (8 rooms).
When mapping, prepare your sanctum floor while running a low investment atlas strategy such as Eldritch Altar or Alch and Go farming in order to maximise your currency gains while trying to farm Sanctum content.
When selecting your path through the sanctum, plot a course that provides the most connected rooms. Granting you a higher chance of encountering an offering room. Select the highest risk level you think you can do in offering rooms to receive loot worth your time, taking a risk is better than receiving a paltry reward.
Monitor your resolve and Aureus Coins at all times, selecting merchant and fountain rooms only when necessary.
When farming Forbidden Sanctum in the endgame, small maps that can be completed quickly are always preferred to maximize the amount of floors you can clear per session. The maps below are fantastic choices for speed mapping.
- City Square/Mesa are considered the fastest and most linear maps in Path of Exile. They are almost identical every time you run them, making them the top picks for speed mapping strategies. Being so small and fast to run means they don't have the best natural mob counts, thus they are difficult to sustain effectively without investment.
- Toxic Sewer is one of the best map layouts in Path of Exile, boasting a strong natural monster count for easy map sustain. It is one of the only linear indoor maps, making it a great choice for builds without a lot of AoE that still want to clear extremely fast.
- Ashen Wood is a small open layout map with a good natural mob count and a very easy boss. It also drops The Scout Divination Card which adds additional profit to your farming sessions.
- Canyon is similar to Ashen Wood. It is a small open layout map with almost no terrain to obstruct your movement or league mechanics. This makes it easy to run and a great candidate for synergising with other leagues.
Rolling your maps correctly is mandatory for making profit and sustaining maps in the end game.
For this strategy, roll all of your maps using the following materials that you intend to run for Forbidden Sanctum.
- Clean Your Maps - Ensure all of your maps are identified and then use an Orb of Scouring to make them all normal rarity, since achieving 20% quality on white maps requires significantly less Cartographer's Chisels.
- Chiseling - Use Cartographer's Chisels on all of your maps until each one is 20% quality.
- Alchemy Orbs - Use Orb of Alchemys on every map you have at 20% quality. Re-roll maps your character cannot run using Orb of Scouring and Orb of Alchemy.
- Vaal Orbs - Use Vaal Orbs on all of your appropriately rolled maps. Some maps may transform or receive new modifiers, so weed out any maps with modifiers your build cannot run or maps that are no longer on a favourable layout. On average, using Vaal Orbs on high tiers maps is always worth it.
To ensure you're making as much currency as possible in the end game you should combine your forbidden sanctum preparations with another atlas strategy. The strategies we recommend include the following:
Eldritch Altar Farming is a mapping strategy that focuses on moving fast and prioritises running small maps quickly, making it the ideal partner for Forbidden Sanctum. Altars only unlock in the endgame so this strategy will have to wait until then.
Alch and Go is a strategy similar to eldritch altar farming in what it offers in the speed clearing department but is accessible at all stages of atlas progression. It is also another excellent pick for pairing with Forbidden Sanctum farming.
Orbs of Horizon
If you are struggling to sustain high tier maps with layouts that are ideal for speed mapping, you can use Orbs of Horizons to transform maps you don't have a use for into better layouts.
Each tier of maps will transform into a specific set of map layouts which change each league. Use Orbs of Horizons on the following tiers of maps you don't have a use for to re-stock your map pool.
Tier 16 - Toxic Sewer, Graveyard
Tier 15 - Dunes, Ashen Wood, Grotto
Tier 14 - Canyon, Underground Sea
Some of these maps are fantastic for speed mapping while some are just mediocre, however using all of the recommended maps here will allow you to easily sustain a map pool early on in a league.
This guide explains:
- An overview of the Forbidden Sanctum league mechanic
- What each of the rooms within the sanctum do
- The power of relics and the modifiers you can expect to see on them
- The rewards you'll find that make farming the mechanic worthwhile
- How to run Sanctums efficiently in the end game
- Ideal map choices and how to roll them
- Strategy synergies and a tip to sustain maps at high tiers
Written by Grimro.
Reviewed by Fyregrass.
- Additional Sanctum Room Info Added - Relic Modifiers Added