how to get to deacons of the deep

February 18, 2026

To reach the Deacons of the Deep in Dark Souls 3, you need to make your way through the Cathedral of the Deep and reach its innermost chamber, where Aldrich’s tomb lies at the very back of the cathedral.

Starting point: getting to Cathedral of the Deep

If you’re not yet at the Cathedral of the Deep, the usual route is:

From Road of Sacrifices area
- Progress through Road of Sacrifices until you reach the Crystal Sage boss.
- Defeat Crystal Sage to unlock the path forward toward the cathedral.

From Crystal Sage bonfire
- From the Crystal Sage bonfire, go through the stone arch and follow the path forward, passing through enemies and small camps.
- Continue until you reach the “Cathedral of the Deep” bonfire outside the massive church doors.

Once you have the Cathedral of the Deep bonfire, you’re in the right zone for the Deacons of the Deep.

Navigating inside Cathedral of the Deep

From the “Cathedral of the Deep” bonfire, your goal is to push deeper into the cathedral interior:

Enter through the big doors and work your way through the lower interior, dealing with Hollows, Evangelists, and Deacons as you go.

Activate shortcuts and side bonfires as you explore; you’ll loop around the outside and inside of the building, gradually climbing higher and then dropping back into lower areas.

Think of it as spiraling through the cathedral until you eventually reach the giant-filled lower hall.

Reaching the Deacons’ boss door

The Deacons of the Deep are in the back of the Cathedral of the Deep, effectively its innermost chamber, behind where Aldrich’s tomb is placed.

Use this mental checklist from the main cathedral interior:

Find the giant hall
- There is a huge room with one or more slumbering giants lying in flooded sections.
- Bonfires and shortcuts typically connect down into this area from earlier parts of the cathedral.

Locate the stairs behind a giant
- In the giant hall, look for a staircase tucked in a corner behind one of the giants.
- This staircase is the critical path up to the Deacons of the Deep boss chamber.

Go up to the back chamber
- Climb those stairs and follow the path upward and forward.
- At the end of this route, you’ll find the fog gate leading into the innermost chamber—this is the Deacons of the Deep arena, set in the room with Aldrich’s tomb.

Once you pass through the fog gate, the Deacons of the Deep boss fight begins.

Simple route recap (step list)

Reach Crystal Sage and defeat it.

From the Crystal Sage bonfire, follow the path to reach the Cathedral of the Deep bonfire outside the big church.

Work your way through Cathedral of the Deep’s interior, unlocking shortcuts until you reach the large hall with giants.

In that hall, find the corner stairs behind one of the giants and go up.

Follow the route forward to the fog gate at the very back of the cathedral: that room is the Deacons of the Deep boss arena.

Quick HTML “cheat sheet” path

Since you asked for a structured, “quick scoop” style breakdown, here’s a compact HTML-style summary you could imagine dropping into a guide:

html

<h1>How to get to Deacons of the Deep</h1>

<h2>Quick Path Overview</h2>
<ul>
  <li>Defeat Crystal Sage in Road of Sacrifices.</li>
  <li>From Crystal Sage bonfire, follow the path to the Cathedral of the Deep bonfire.</li>
  <li>Push through the cathedral interior, unlocking shortcuts and reaching the giant hall.</li>
  <li>Find the staircase behind one of the giants in the corner.</li>
  <li>Go up the stairs and follow the path to the fog gate at the back chamber.</li>
</ul>

<h2>Final Destination</h2>
<p>
The Deacons of the Deep boss fight is in the innermost chamber of the Cathedral of the Deep,
at the back where Aldrich’s tomb rests.
</p>

TL;DR: Get to Cathedral of the Deep via Crystal Sage, clear through until you reach the giant-filled hall, then take the stairs behind a giant up to the back chamber—the Deacons’ fog gate is there.

Information gathered from public forums or data available on the internet and portrayed here.