diff --git a/CHANGELOG.md b/CHANGELOG.md
index 678e5b5..a7d1efb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 ## Version 1.2.5
 * Aeon
 	* Aeon Bane now once again supports dispel on non attack roll spells.
+* Mythic Abilities
+	* Archmage Armor
+		* No longer works when cast from items.
+		* Now requires knowing Mage Armor as a prerequisite.
 
 ## Version 1.2.4
 * Mythic Abilities
diff --git a/TabletopTweaks-Reworks/Config/Homebrew.json b/TabletopTweaks-Reworks/Config/Homebrew.json
index 4f7f8a9..8593d3d 100644
--- a/TabletopTweaks-Reworks/Config/Homebrew.json
+++ b/TabletopTweaks-Reworks/Config/Homebrew.json
@@ -19,6 +19,11 @@
         "Homebrew": true,
         "Description": "Now grants two bonus casts instead of four."
       },
+      "ArchmageArmor": {
+        "Enabled": true,
+        "Homebrew": true,
+        "Description": "No longer works when cast from items and requires you know mage armor as a prerequisite."
+      },
       "DimensionalRetribution": {
         "Enabled": true,
         "Homebrew": true,
diff --git a/TabletopTweaks-Reworks/Patches/MythicAbilities.cs b/TabletopTweaks-Reworks/Patches/MythicAbilities.cs
index 5137ef7..a6a914c 100644
--- a/TabletopTweaks-Reworks/Patches/MythicAbilities.cs
+++ b/TabletopTweaks-Reworks/Patches/MythicAbilities.cs
@@ -23,7 +23,9 @@
 using TabletopTweaks.Core.NewComponents;
 using TabletopTweaks.Core.NewComponents.AbilitySpecific;
 using TabletopTweaks.Core.NewComponents.OwlcatReplacements;
+using TabletopTweaks.Core.NewComponents.Prerequisites;
 using TabletopTweaks.Core.Utilities;
+using static Kingmaker.Blueprints.Classes.Prerequisites.Prerequisite;
 using static TabletopTweaks.Reworks.Main;
 
 namespace TabletopTweaks.Reworks.Reworks {
@@ -346,12 +348,25 @@ static class BlueprintsCache_Init_Patch {
                 TTTContext.Logger.LogPatch(UnrelentingAssaultEffectBuff);
             }
             static void PatchArchmageArmor() {
-                if (Main.TTTContext.Homebrew.MythicAbilities.IsDisabled("GreaterEnduringSpells")) { return; }
+                if (Main.TTTContext.Homebrew.MythicAbilities.IsDisabled("ArchmageArmor")) { return; }
 
                 var ArchmageArmor = BlueprintTools.GetBlueprint<BlueprintFeature>("c3ef5076c0feb3c4f90c229714e62cd0");
+                var ArcanistExploitArmoredMaskAbility = BlueprintTools.GetBlueprint<BlueprintAbility>("2d7d510c6e2e3e54ab9eee84a41fa2cf");
                 var MageArmor = BlueprintTools.GetBlueprint<BlueprintAbility>("9e1ad5d6f87d19e4d8883d63a6e35568");
                 var MageArmorBuffMythic = BlueprintTools.GetBlueprint<BlueprintBuff>("355be0688dabc21409f37942d637cdab");
 
+                ArchmageArmor.TemporaryContext(bp => {
+                    bp.AddPrerequisite<PrerequisiteSpellKnown>(p => {
+                        p.m_Spell = MageArmor.ToReference<BlueprintAbilityReference>();
+                        p.RequireSpellbook = false;
+                        p.Group = GroupType.Any;
+                    });
+                    bp.AddPrerequisite<PrerequisiteSpellKnown>(p => {
+                        p.m_Spell = ArcanistExploitArmoredMaskAbility.ToReference<BlueprintAbilityReference>();
+                        p.RequireSpellbook = false;
+                        p.Group = GroupType.Any;
+                    });
+                });
                 MageArmor.TemporaryContext(bp => {
                     bp.FlattenAllActions().OfType<Conditional>().ForEach(a => {
                         a.ConditionsChecker.Conditions = a.ConditionsChecker.Conditions.AppendToArray(