Great Deep Soul is a sorcery in Dark Souls III.
- Sorcery which improves upon Deep Soul. Fires powerful darkened soul dregs.
- Archdeacon McDonnell, a sorcerer himself, delighted in the cathedral's stagnating souls. For him, they represented the glorious bedrock of this world.
Obtained as a reward for reaching Rank 1 in the Aldrich Faithful covenant.
To achieve this, the player must offer 10 Human Dregs to Archdeacon McDonnell's body in Irithyll of the Boreal Valley.
Fires powerful darkened soul dregs.