- Sold by Chancellor Wellager for 9,300 souls.
- Found in a chest in Aldia's Keep. The chest is located on the top level of the entrance hall, in a corner to the right of the dragon skeleton.
When cast, Great Magic Barrier covers the caster in a white aura, giving them a boost of 250 to all elemental resistances.
The duration of the miracle depends on the caster's faith, maxing at 90 seconds with 50 faith.
Although Great Magic Barrier provides more raw defence than Magic Barrier, it does not affect allies. This means the lesser version may provide more total damage reduction when playing with friendly phantoms.
Like most other spells, the amount of casts per slot increases upon reaching certain Attunement milestones:
|Attunement Level||Amount of Casts|
| Blinding Bolt • Bountiful Sunlight • Caressing Prayer • Denial • Emit Force • Force • Great Heal • Great Heal Excerpt|
Great Lightning Spear • Great Magic Barrier • Guidance • Heal • Heavenly Thunder • Homeward • Lightning Spear
Magic Barrier • Med Heal • Perseverance • Replenishment • Resplendent Life • Sacred Oath • Soothing Sunlight
Soul Appease • Splintering Lightning Spear • Sunlight Blade • Sunlight Spear • Unveil • Wrath of the Gods