diff --git a/src/adv/Adv.lua b/src/adv/Adv.lua
index 8b4288f..49933dd 100644
--- a/src/adv/Adv.lua
+++ b/src/adv/Adv.lua
@@ -983,7 +983,8 @@ function Adv:useSpecialSkill(skillId)
 	local skillData = csvdb["adv_skill_specialCsv"][skillId][skillLevel]
 	--cost
 	if self.advInfo.power < skillData.cost then return end
-	self.advInfo.power = self.advInfo.power - skillData.cost
+	self:changePower( -skillData.cost, 0)
+	-- self.advInfo.power = self.advInfo.power - skillData.cost
 	local enemy = self.battle.enemy
 	self.battle.player:addSpecialSkill(skillId, skillLevel, enemy)
 	return true
--
libgit2 0.21.2