Mason's Guild

The main entrance to the Mason's Guild

Shadow-Cursed Lands
Grand Mausoleum
↑
House of Healing	←	Mason's Guild
↓
Reithwin Tollhouse

The Mason's Guild is a Location within the Shadow-Cursed Lands in Act Two of Baldur's Gate 3.

Overview

The Mason's Guild can be found alongside the river and north of the Reithwin Tollhouse.

The party can reach the Mason's Guild Basement in two ways. At X: -129 Y: 23, beneath the stairs, is a slightly obscured Ornate Wooden Hatch that leads to the basement. At X: -130 Y: 21 is a control wheel that services an elevator leading to the basement.

Mason's Guild Basement

Inside the basement at X: 129 Y: -692 there is a Keyholed Herald ( DC 10 Perception check) that can be lockpicked (DC 18) to access an area with a trapped (DC 18) gilded chest. The Herald can also be opened with the Tower-Shaped Key from Mattis at the Last Light Inn

At the end of the hallway there is the Mason's Hall with some shadow enemies: Shadow ×5 and Wraith ×1.

On the table is the Mason's Log, which will complete the quest  Investigate the Selûnite Resistance. (AoE spells that include the mason's log may destroy it, stopping this optional part of the Selunite quest.)

Behind the altar is a trapped (Perception DC 15) Gilded Chest (Disarm DC 21, Lockpick DC 14) that contains Helmet of Arcane Acuity

At X: 120 Y: -734 there is a button (Perception DC 10) that opens a secret door to an area with two heavy chests: one containing potions and one with scrolls (including Scroll of Knock). On a table nearby is a Moonrise Diagram, which marks a secret item stash in the Moonrise dungeon on the map.

Creatures

• Shadow
• Wraith

Quests

•  Investigate the Selûnite Resistance

Loot

• Infernal Iron - on the ground level, in the northeast near the iron ladder at X: -103 Y: 19
• Helmet of Arcane Acuity - in a chest behind an altar in the basement
• Mason's Log - in the basement at X: 108 Y: -748
• Moonrise Diagram -- in the basement at X: 120 Y: -734