diff --git a/spec/System/TestBirthedReservation_spec.lua b/spec/System/TestBirthedReservation_spec.lua
new file mode 100644
index 0000000000..af43b79e89
--- /dev/null
+++ b/spec/System/TestBirthedReservation_spec.lua
@@ -0,0 +1,50 @@
+describe("TestBirthedReservation", function()
+	before_each(function()
+		newBuild()
+		build.configTab.input.customMods = "+1000 to Spirit"
+		build.configTab:BuildModList()
+	end)
+
+	local function grantAmulet(baseName, skillLine)
+		build.itemsTab:CreateDisplayItemFromRaw("New Item\n"..baseName.."\nImplicits: 1\nGrants Skill: "..skillLine.."\n")
+		build.itemsTab:AddDisplayItem()
+	end
+
+	it("Absent Amulet grants a reservation-free skill", function()
+		grantAmulet("Absent Amulet", "Level 20 Archmage")
+		runCallback("OnFrame")
+		assert.are.equals(0, build.calcsTab.mainOutput.SpiritReserved)
+	end)
+
+	it("other Birthed amulets (Lament, Portent) are not affected and still reserve", function()
+		grantAmulet("Lament Amulet", "Level 20 Archmage")
+		runCallback("OnFrame")
+		assert.are.equals(100, build.calcsTab.mainOutput.SpiritReserved)
+
+		newBuild()
+		build.configTab.input.customMods = "+1000 to Spirit"
+		build.configTab:BuildModList()
+		grantAmulet("Portent Amulet", "Level 20 Archmage")
+		runCallback("OnFrame")
+		assert.are.equals(100, build.calcsTab.mainOutput.SpiritReserved)
+	end)
+
+	it("support gems added to a birthed-granted skill still reserve", function()
+		grantAmulet("Absent Amulet", "Level 20 Archmage")
+		build.skillsTab:PasteSocketGroup("Slot: Amulet\nClarity I 1/0  1\n")
+		runCallback("OnFrame")
+		assert.are.equals(10, build.calcsTab.mainOutput.SpiritReserved)
+	end)
+
+	it("a non-birthed item granting the same skill still reserves normally", function()
+		grantAmulet("Lapis Amulet", "Level 20 Archmage")
+		runCallback("OnFrame")
+		assert.are.equals(100, build.calcsTab.mainOutput.SpiritReserved)
+	end)
+
+	it("a socketed copy of the skill still reserves normally", function()
+		build.skillsTab:PasteSocketGroup("Archmage 20/0  1\n")
+		runCallback("OnFrame")
+		assert.are.equals(100, build.calcsTab.mainOutput.SpiritReserved)
+	end)
+end)
diff --git a/src/Classes/Item.lua b/src/Classes/Item.lua
index 684f904714..db6d4bfca5 100644
--- a/src/Classes/Item.lua
+++ b/src/Classes/Item.lua
@@ -2139,6 +2139,7 @@ function ItemClass:BuildModList()
 				skillId = skill.skillId,
 				level = skill.level,
 				noSupports = skill.noSupports,
+				noReservation = self.base and self.base.grantedSkillsReserveNoSpirit or nil,
 				source = self.modSource,
 				triggered = skill.triggered,
 				triggerChance = skill.triggerChance,
diff --git a/src/Data/Bases/amulet.lua b/src/Data/Bases/amulet.lua
index be1b2ba358..8aeb525655 100644
--- a/src/Data/Bases/amulet.lua
+++ b/src/Data/Bases/amulet.lua
@@ -130,6 +130,7 @@ itemBases["Portent Amulet"] = {
 itemBases["Absent Amulet"] = {
 	type = "Amulet",
 	tags = { amulet = true, default = true, },
+	grantedSkillsReserveNoSpirit = true,
 	variantList = { "Cast on Elemental Ailment", "Cast on Critical", "Cast on Dodge", "Rhoa Mount", "Archmage", "Trinity", "Eternal Rage", },
 	implicit = "-1 Prefix Modifier allowed\n-1 Suffix Modifier allowed\n{variant:1}Grants Skill: Level (1-20) Cast on Elemental Ailment\n{variant:2}Grants Skill: Level (1-20) Cast on Critical\n{variant:3}Grants Skill: Level (1-20) Cast on Dodge\n{variant:4}Grants Skill: Level (1-20) Rhoa Mount\n{variant:5}Grants Skill: Level (1-20) Archmage\n{variant:6}Grants Skill: Level (1-20) Trinity\n{variant:7}Grants Skill: Level (1-20) Eternal Rage",
 	implicitModTypes = { {  }, {  }, },
diff --git a/src/Export/Scripts/bases.lua b/src/Export/Scripts/bases.lua
index 6bc3151bc4..f2d4145c30 100644
--- a/src/Export/Scripts/bases.lua
+++ b/src/Export/Scripts/bases.lua
@@ -140,6 +140,9 @@ directiveTable.base = function(state, args, out)
 		out:write(tag, ' = true, ')
 	end
 	out:write('},\n')
+	if baseTypeId == "Metadata/Items/Amulets/FourAmuletB1c" then
+		out:write('\tgrantedSkillsReserveNoSpirit = true,\n')
+	end
 	local implicitLines = { }
 	local implicitModTypes = { }
 	local variantList = { }
diff --git a/src/Modules/CalcDefence.lua b/src/Modules/CalcDefence.lua
index c21c9e199c..35f471e818 100644
--- a/src/Modules/CalcDefence.lua
+++ b/src/Modules/CalcDefence.lua
@@ -252,6 +252,10 @@ function calcs.doActorLifeManaSpiritReservation(actor)
 				pool.Life.basePercent = pool.Life.basePercent + pool.Spirit.basePercent * spiritToLifeReservation
 				pool.Spirit.basePercent = 0
 			end
+			if activeSkill.activeEffect.srcInstance and activeSkill.activeEffect.srcInstance.noReservation then
+				for _, values in pairs(pool) do values.baseFlat, values.basePercent = 0, 0 end
+				pool.Spirit.baseFlat = skillModList:Sum("BASE", skillCfg, "ExtraSpirit")
+			end
 			for name, values in pairs(pool) do
 				values.more = skillModList:More(skillCfg, name.."Reserved", "Reserved")
 				values.inc = skillModList:Sum("INC", skillCfg, name.."Reserved", "Reserved")
diff --git a/src/Modules/CalcSetup.lua b/src/Modules/CalcSetup.lua
index 38a68d62f1..5ba727778c 100644
--- a/src/Modules/CalcSetup.lua
+++ b/src/Modules/CalcSetup.lua
@@ -1534,6 +1534,7 @@ function calcs.initEnv(build, mode, override, specEnv)
 				activeGemInstance.enableGlobal1 = true
 				activeGemInstance.noSupports = grantedSkill.noSupports
 				group.noSupports = grantedSkill.noSupports
+				activeGemInstance.noReservation = grantedSkill.noReservation
 				activeGemInstance.triggered = grantedSkill.triggered
 				activeGemInstance.triggerChance = grantedSkill.triggerChance
 				wipeTable(group.gemList)