diff --git a/RootDesk/MyDesk/SlayDeckController.codeblock b/RootDesk/MyDesk/SlayDeckController.codeblock
index 73aed22..62ba71c 100644
--- a/RootDesk/MyDesk/SlayDeckController.codeblock
+++ b/RootDesk/MyDesk/SlayDeckController.codeblock
@@ -3340,7 +3340,7 @@
               "Name": "slot"
             }
           ],
-          "Code": "if self:IsDiscardSelecting() == true then\n\tself:SelectDiscardSlot(slot)\n\treturn\nend\nif self:IsRetainSelecting() == true then\n\tself:SelectRetainSlot(slot)\n\treturn\nend\nif self:IsReserveSelecting() == true then\n\tself:SelectReserveSlot(slot)\n\treturn\nend\nif self.CombatOver == true or self.FxBusy == true or self.TurnBusy == true then\n\treturn\nend\nif self.Hand == nil then\n\treturn\nend\nlocal cardId = self.Hand[slot]\nif cardId == nil then\n\treturn\nend\nlocal c = self.Cards[cardId]\nif c == nil then\n\treturn\nend\nif c.unplayable == true then\n\tself:Toast(\"사용할 수 없는 카드입니다\")\n\treturn\nend\nif self:CanPlayCardNow(c) ~= true then\n\treturn\nend\nlocal cost = c.cost or 0\nlocal skillFree = false\nlocal skillRepeat = 0\nif self.HandCostZeroThisTurn == true then\n\tcost = 0\nelseif c.useAllEnergy == true then\n\tcost = self.Energy\nend\nif c.kind == \"Skill\" and self.NextSkillCostZero == true then\n\tcost = 0\n\tskillFree = true\nend\nif c.kind == \"Skill\" and self.SkillCostReductionThisTurn ~= nil and self.SkillCostReductionThisTurn > 0 then\n\tcost = math.max(0, cost - self.SkillCostReductionThisTurn)\nend\nif self.CombatCardCostReduction ~= nil and self.CombatCardCostReduction[cardId] ~= nil then\n\tcost = math.max(0, cost - self.CombatCardCostReduction[cardId])\nend\nif c.kind == \"Skill\" and self.NextSkillRepeatCount ~= nil and self.NextSkillRepeatCount > 0 then\n\tskillRepeat = self.NextSkillRepeatCount\nend\nif self.Energy < cost then\n\tself:Toast(\"에너지가 부족합니다\")\n\treturn\nend\nself.Energy = self.Energy - cost\nself.ActiveKillReward = c.rewardOnKill or 0\nself:ResolveCardEffects(cardId, slot, c, false, cost)\nlocal function applyCardPlayHooks()\n\tif self:HasPowerField(\"cardPlayedBlock\") == true then\n\t\tself:AddCardBlock(self:AddPowerFieldTotal(\"cardPlayedBlock\"))\n\tend\n\tif c.cardPlayedDamage ~= nil and c.cardPlayedDamage > 0 then\n\t\tself:DealDirectDamageToTarget(c.cardPlayedDamage)\n\tend\n\tif c.cardPlayedRandomDamage ~= nil and c.cardPlayedRandomDamage > 0 then\n\t\tself:DealDirectDamageToRandomMonster(c.cardPlayedRandomDamage)\n\tend\nend\napplyCardPlayHooks()\nif skillRepeat > 0 then\n\tlocal remaining = (self.NextSkillRepeatCount or 0) - skillRepeat\n\tif remaining < 0 then\n\t\tremaining = 0\n\tend\n\tself.NextSkillRepeatCount = remaining\n\tfor i = 1, skillRepeat do\n\t\tself:ResolveCardEffects(cardId, slot, c, false, cost)\n\t\tapplyCardPlayHooks()\n\tend\nend\nif c.kind == \"Attack\" then\n\tself.TurnAttackCardsPlayed = (self.TurnAttackCardsPlayed or 0) + 1\nend\nif skillFree == true then\n\tif c.nextSkillCostZero ~= true then\n\t\tself.NextSkillCostZero = false\n\tend\nend\nif self.ActiveKillReward ~= nil and self.ActiveKillReward <= 0 then\n\tself.ActiveKillReward = 0\nend\nif c.combatCostReductionOnPlay ~= nil and c.combatCostReductionOnPlay > 0 then\n\tif self.CombatCardCostReduction == nil then\n\t\tself.CombatCardCostReduction = {}\n\tend\n\tself.CombatCardCostReduction[cardId] = (self.CombatCardCostReduction[cardId] or 0) + c.combatCostReductionOnPlay\nend\ntable.remove(self.Hand, slot)\nif c.exhaust == true then\n\tif self.ExhaustPile == nil then self.ExhaustPile = {} end\n\ttable.insert(self.ExhaustPile, cardId)\nelseif c.kind ~= \"Power\" then\n\ttable.insert(self.DiscardPile, cardId)\nend\nself:RenderHand(false)\nself:RenderPiles()\nself:RenderCombat()\nif self:BeginDiscardSelection(c) == true then\n\treturn\nend\nif self:BeginReserveSelection(c) == true then\n\treturn\nend\nself:RenderHand(false)\nself:RenderPiles()\nself:RenderCombat()\nself:CheckCombatEnd()",
+          "Code": "if self:IsDiscardSelecting() == true then\n\tself:SelectDiscardSlot(slot)\n\treturn\nend\nif self:IsRetainSelecting() == true then\n\tself:SelectRetainSlot(slot)\n\treturn\nend\nif self:IsReserveSelecting() == true then\n\tself:SelectReserveSlot(slot)\n\treturn\nend\nif self.CombatOver == true or self.FxBusy == true or self.TurnBusy == true then\n\treturn\nend\nif self.Hand == nil then\n\treturn\nend\nlocal cardId = self.Hand[slot]\nif cardId == nil then\n\treturn\nend\nlocal c = self.Cards[cardId]\nif c == nil then\n\treturn\nend\nif c.unplayable == true then\n\tself:Toast(\"사용할 수 없는 카드입니다\")\n\treturn\nend\nif self:CanPlayCardNow(c) ~= true then\n\treturn\nend\nlocal cost = c.cost or 0\nlocal skillFree = false\nlocal skillRepeat = 0\nif self.HandCostZeroThisTurn == true then\n\tcost = 0\nelseif c.useAllEnergy == true then\n\tcost = self.Energy\nend\nif c.kind == \"Skill\" and c.useAllEnergy ~= true and self.NextSkillCostZero == true then\n\tcost = 0\n\tskillFree = true\nend\nif c.kind == \"Skill\" and c.useAllEnergy ~= true and self.SkillCostReductionThisTurn ~= nil and self.SkillCostReductionThisTurn > 0 then\n\tcost = math.max(0, cost - self.SkillCostReductionThisTurn)\nend\nif c.useAllEnergy ~= true and self.CombatCardCostReduction ~= nil and self.CombatCardCostReduction[cardId] ~= nil then\n\tcost = math.max(0, cost - self.CombatCardCostReduction[cardId])\nend\nif c.kind == \"Skill\" and self.NextSkillRepeatCount ~= nil and self.NextSkillRepeatCount > 0 then\n\tskillRepeat = self.NextSkillRepeatCount\nend\nif self.Energy < cost then\n\tself:Toast(\"에너지가 부족합니다\")\n\treturn\nend\nself.Energy = self.Energy - cost\nself.ActiveKillReward = c.rewardOnKill or 0\nself:ResolveCardEffects(cardId, slot, c, false, cost)\nlocal function applyCardPlayHooks()\n\tif self:HasPowerField(\"cardPlayedBlock\") == true then\n\t\tself:AddCardBlock(self:AddPowerFieldTotal(\"cardPlayedBlock\"))\n\tend\n\tif c.cardPlayedDamage ~= nil and c.cardPlayedDamage > 0 then\n\t\tself:DealDirectDamageToTarget(c.cardPlayedDamage)\n\tend\n\tif c.cardPlayedRandomDamage ~= nil and c.cardPlayedRandomDamage > 0 then\n\t\tself:DealDirectDamageToRandomMonster(c.cardPlayedRandomDamage)\n\tend\nend\napplyCardPlayHooks()\nif skillRepeat > 0 then\n\tlocal remaining = (self.NextSkillRepeatCount or 0) - skillRepeat\n\tif remaining < 0 then\n\t\tremaining = 0\n\tend\n\tself.NextSkillRepeatCount = remaining\n\tfor i = 1, skillRepeat do\n\t\tself:ResolveCardEffects(cardId, slot, c, false, cost)\n\t\tapplyCardPlayHooks()\n\tend\nend\nif c.kind == \"Attack\" then\n\tself.TurnAttackCardsPlayed = (self.TurnAttackCardsPlayed or 0) + 1\nend\nif skillFree == true then\n\tif c.nextSkillCostZero ~= true then\n\t\tself.NextSkillCostZero = false\n\tend\nend\nif self.ActiveKillReward ~= nil and self.ActiveKillReward <= 0 then\n\tself.ActiveKillReward = 0\nend\nif c.combatCostReductionOnPlay ~= nil and c.combatCostReductionOnPlay > 0 then\n\tif self.CombatCardCostReduction == nil then\n\t\tself.CombatCardCostReduction = {}\n\tend\n\tself.CombatCardCostReduction[cardId] = (self.CombatCardCostReduction[cardId] or 0) + c.combatCostReductionOnPlay\nend\ntable.remove(self.Hand, slot)\nif c.exhaust == true then\n\tif self.ExhaustPile == nil then self.ExhaustPile = {} end\n\ttable.insert(self.ExhaustPile, cardId)\nelseif c.kind ~= \"Power\" then\n\ttable.insert(self.DiscardPile, cardId)\nend\nself:RenderHand(false)\nself:RenderPiles()\nself:RenderCombat()\nif self:BeginDiscardSelection(c) == true then\n\treturn\nend\nif self:BeginReserveSelection(c) == true then\n\treturn\nend\nself:RenderHand(false)\nself:RenderPiles()\nself:RenderCombat()\nself:CheckCombatEnd()",
           "Scope": 2,
           "ExecSpace": 6,
           "Attributes": [],
diff --git a/tools/balance/sim-balance.mjs b/tools/balance/sim-balance.mjs
index f7e5c19..20bcb5e 100644
--- a/tools/balance/sim-balance.mjs
+++ b/tools/balance/sim-balance.mjs
@@ -659,7 +659,7 @@ export function simulateCombat(data, rng, stats) {
       const baseCost = c.cost || 0;
       const combatReduction = combatCardCostReduction[id] || 0;
       const cost = handCostZeroThisTurn === true ? 0 : (c.useAllEnergy === true ? energy : (skillFree ? 0 : (c.kind === 'Skill' ? Math.max(0, baseCost - skillCostReductionThisTurn) : baseCost)));
-      const finalCost = Math.max(0, cost - combatReduction);
+      const finalCost = c.useAllEnergy === true ? cost : Math.max(0, cost - combatReduction);
       energy -= finalCost;
       resolveCardEffects(id, c, finalCost);
       const playedBlock = powerFieldTotal('cardPlayedBlock');
diff --git a/tools/deck/cb/combat.mjs b/tools/deck/cb/combat.mjs
index 91c0abd..276903d 100644
--- a/tools/deck/cb/combat.mjs
+++ b/tools/deck/cb/combat.mjs
@@ -52,14 +52,14 @@ if self.HandCostZeroThisTurn == true then
 elseif c.useAllEnergy == true then
 	cost = self.Energy
 end
-if c.kind == "Skill" and self.NextSkillCostZero == true then
+if c.kind == "Skill" and c.useAllEnergy ~= true and self.NextSkillCostZero == true then
 	cost = 0
 	skillFree = true
 end
-if c.kind == "Skill" and self.SkillCostReductionThisTurn ~= nil and self.SkillCostReductionThisTurn > 0 then
+if c.kind == "Skill" and c.useAllEnergy ~= true and self.SkillCostReductionThisTurn ~= nil and self.SkillCostReductionThisTurn > 0 then
 	cost = math.max(0, cost - self.SkillCostReductionThisTurn)
 end
-if self.CombatCardCostReduction ~= nil and self.CombatCardCostReduction[cardId] ~= nil then
+if c.useAllEnergy ~= true and self.CombatCardCostReduction ~= nil and self.CombatCardCostReduction[cardId] ~= nil then
 	cost = math.max(0, cost - self.CombatCardCostReduction[cardId])
 end
 if c.kind == "Skill" and self.NextSkillRepeatCount ~= nil and self.NextSkillRepeatCount > 0 then