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 Rank1 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.