diff --git a/unofficial/c511027583.lua b/unofficial/c511027583.lua
new file mode 100644
index 0000000000..967ca31c1c
--- /dev/null
+++ b/unofficial/c511027583.lua
@@ -0,0 +1,34 @@
+--幻げん木ぼく龍りゅう (Anime)
+--Mythic Tree Dragon (Anime)
+--Made by When
+local s,id=GetID()
+function s.initial_effect(c)
+	--Double Level
+	local e1=Effect.CreateEffect(c)
+	e1:SetDescription(aux.Stringid(id,0))
+	e1:SetCategory(CATEGORY_LVCHANGE)
+	e1:SetType(EFFECT_TYPE_IGNITION)
+	e1:SetRange(LOCATION_MZONE)
+	e1:SetCountLimit(1)
+	e1:SetCondition(s.condition)
+	e1:SetOperation(s.operation)
+	c:RegisterEffect(e1)
+end
+function s.cfilter(c)
+	return c:IsFaceup() and c:IsAttribute(ATTRIBUTE_WATER)
+end
+function s.condition(e,tp,eg,ep,ev,re,r,rp)
+        return Duel.IsExistingMatchingCard(aux.FaceupFilter(s.cfilter),tp,LOCATION_MZONE,0,1,nil)
+end
+function s.operation(e,tp,eg,ep,ev,re,r,rp)
+	local c=e:GetHandler()
+	if c:IsFaceup() and c:IsRelateToEffect(e) then
+	    local e1=Effect.CreateEffect(c)
+	    e1:SetType(EFFECT_TYPE_SINGLE)
+            e1:SetRange(LOCATION_MZONE)
+	    e1:SetCode(EFFECT_CHANGE_LEVEL)
+	    e1:SetValue(c:GetLevel()*2)
+	    e1:SetReset(RESET_EVENT|RESETS_STANDARD_DISABLE|RESET_PHASE|PHASE_END)
+	    c:RegisterEffect(e1)
+	end
+end