diff --git a/AutoUseItems.lua b/AutoUseItems.lua
index 63d8167..6f5d6f2 100644
--- a/AutoUseItems.lua
+++ b/AutoUseItems.lua
@@ -22,6 +22,7 @@ AutoUseItems.optionLotus = Menu.AddOption({"Item Specific"}, "Lotus Orb", "(For
 AutoUseItems.optionCrest = Menu.AddOption({"Item Specific"}, "Medallion & Crest", "Auto use medallion & crest to save ally")
 AutoUseItems.optionGlimmerCape = Menu.AddOption({"Item Specific"}, "Glimmer Cape", "Auto use Glimmer Cape when channeling spells or ally in danger")
 AutoUseItems.optionGhost = Menu.AddOption({"Item Specific"}, "Ghost Scepter", "Auto use ghost scepter to avoid damage from physical cores")
+AutoUseItems.optionSatanic = Menu.AddOption({"Item Specific"}, "Satanic", "Auto use Satanic when (i) legion or axe is around; or (ii) hp is low and my hero is attacking.")
 
 function AutoUseItems.OnUpdate()
     local myHero = Heroes.GetLocal()
@@ -70,6 +71,10 @@ function AutoUseItems.OnUpdate()
         AutoUseItems.item_ghost(myHero)
     end
 
+    if Menu.IsEnabled(AutoUseItems.optionSatanic) then
+        AutoUseItems.item_satanic(myHero)
+    end
+
     -- ========================
     -- Aggressive items
     -- ========================
@@ -537,6 +542,30 @@ function AutoUseItems.item_ghost(myHero)
     end
 end
 
+-- Auto use Satanic when (i) legion or axe is around; or (ii) hp is low and my hero is attacking.
+function AutoUseItems.item_satanic(myHero)
+    local item = NPC.GetItem(myHero, "item_satanic", true)
+    if not item or not Ability.IsCastable(item, NPC.GetMana(myHero)) then return end
+
+    -- when hp is low and myHero is attacking
+    if Entity.GetHealth(myHero) <= 0.5 * Entity.GetMaxHealth(myHero) and NPC.IsAttacking(myHero) then
+        Ability.CastNoTarget(item)
+        return
+    end
+
+    -- when legion or axe is around
+    for i = 1, Heroes.Count() do
+        local enemy = Heroes.Get(i)
+        if enemy and not NPC.IsIllusion(enemy) and not Entity.IsSameTeam(myHero, enemy)
+        and not Utility.IsDisabled(enemy) and Utility.IsAxeOrLegion[NPC.GetUnitName(enemy)]
+        and NPC.IsEntityInRange(myHero, enemy, 300) then
+
+            Ability.CastNoTarget(item)
+            return
+        end
+    end
+end
+
 -- Auto cast Glimmer Cape to ally or yourself when channeling spell or need to be saved.
 function AutoUseItems.item_glimmer_cape(myHero)
     local item = NPC.GetItem(myHero, "item_glimmer_cape", true)
diff --git a/Utility.lua b/Utility.lua
index 03f4437..41d7056 100644
--- a/Utility.lua
+++ b/Utility.lua
@@ -20,6 +20,10 @@ Utility.AncientCreepNameList = {
     "npc_dota_roshan"
 }
 
+Utility.IsAxeOrLegion = {}
+Utility.IsAxeOrLegion["npc_dota_hero_legion_commander"] = true
+Utility.IsAxeOrLegion["npc_dota_hero_axe"] = true
+
 Utility.PhysicalCoreHeroes = {}
 Utility.PhysicalCoreHeroes["npc_dota_hero_abaddon"]            = true
 Utility.PhysicalCoreHeroes["npc_dota_hero_alchemist"]          = true