diff --git a/unofficial/c511027561.lua b/unofficial/c511027561.lua
new file mode 100644
index 0000000000..1176c52a1a
--- /dev/null
+++ b/unofficial/c511027561.lua
@@ -0,0 +1,104 @@
+--海晶乙女の決意マリンセス・デシジョン
+--Marincess Decision
+--Made by When
+local s,id=GetID()
+function s.initial_effect(c)
+	--Activate
+	local e1=Effect.CreateEffect(c)
+	e1:SetDescription(aux.Stringid(id,0))
+	e1:SetCategory(CATEGORY_POSITION+CATEGORY_SPECIAL_SUMMON)
+	e1:SetType(EFFECT_TYPE_ACTIVATE)
+	e1:SetCode(EVENT_FREE_CHAIN)
+	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
+	e1:SetCost(s.cost)
+	e1:SetTarget(s.target)
+	e1:SetOperation(s.activate)
+	c:RegisterEffect(e1)
+	--Reduce ATK
+	local e2=Effect.CreateEffect(c)
+	e2:SetDescription(aux.Stringid(id,1))
+	e2:SetCategory(CATEGORY_ATKCHANGE)
+	e2:SetType(EFFECT_TYPE_QUICK_O)
+	e2:SetCode(EVENT_FREE_CHAIN)
+	e2:SetRange(LOCATION_GRAVE)
+	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
+	e2:SetCost(s.atkcost)
+	e2:SetTarget(s.atktg)
+	e2:SetOperation(s.atkop)
+	c:RegisterEffect(e2)
+end
+s.listed_series={0x12b}
+function s.atkfilter(c)
+	return c:IsSetCard(0x12b) and c:IsMonster() and c:IsAbleToRemoveAsCost()
+end
+function s.atkcost(e,tp,eg,ep,ev,re,r,rp,chk)
+	if chk==0 then return aux.bfgcost(e,tp,eg,ep,ev,re,r,rp,0)
+	and Duel.IsExistingMatchingCard(s.atkfilter,tp,LOCATION_GRAVE,0,1,nil) end
+	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
+	local g=Duel.SelectMatchingCard(tp,s.atkfilter,tp,LOCATION_GRAVE,0,1,1,nil)
+        e:SetLabel(g:GetFirst():GetTextAttack())
+	g:AddCard(e:GetHandler())
+	Duel.Remove(g,POS_FACEUP,REASON_COST)
+end
+function s.atktg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
+	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) and chkc:IsFaceup() end
+	if chk==0 then return Duel.IsExistingTarget(Card.IsFaceup,tp,0,LOCATION_MZONE,1,nil) end
+	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
+	Duel.SelectTarget(tp,Card.IsFaceup,tp,0,LOCATION_MZONE,1,1,nil)
+end
+function s.atkop(e,tp,eg,ep,ev,re,r,rp)
+	local c=e:GetHandler()
+	local tc=Duel.GetFirstTarget()
+	if tc and tc:IsFaceup() and tc:IsRelateToEffect(e) then
+		local e1=Effect.CreateEffect(c)
+		e1:SetType(EFFECT_TYPE_SINGLE)
+		e1:SetCode(EFFECT_UPDATE_ATTACK)
+		e1:SetValue(-e:GetLabel())
+		e1:SetReset(RESET_EVENT|RESETS_STANDARD|RESET_PHASE|PHASE_END)
+		tc:RegisterEffect(e1)
+	end
+end
+function s.linkfilter(c,mc,fg)
+	return c:IsLinkSummonable(mc,fg+mc)
+end
+function s.cfilter(c)
+	return c:IsSetCard(0x12b) and c:IsAbleToRemoveAsCost() and aux.SpElimFilter(c,true)
+end
+function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
+	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,nil) end
+	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_REMOVE)
+	local g=Duel.SelectMatchingCard(tp,s.cfilter,tp,LOCATION_MZONE|LOCATION_GRAVE,0,1,1,nil)
+	Duel.Remove(g,POS_FACEUP,REASON_COST)
+end 
+function s.filter(c,tp,fg)
+	return c:IsFacedown() and c:IsDefensePos() and c:IsCanBeLinkMaterial() and c:IsCanChangePosition() 
+        and Duel.IsExistingMatchingCard(s.linkfilter,tp,LOCATION_EXTRA,0,1,nil,c,fg)
+end
+function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
+        local fg=Duel.GetMatchingGroup(aux.FaceupFilter(Card.IsCanBeLinkMaterial),tp,LOCATION_MZONE,0,nil)
+	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(1-tp) and s.filter(chkc,chkc:GetControler(),fg) end
+	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_MZONE,0,1,nil,tp,fg) and Duel.IsPlayerCanSpecialSummonCount(tp,1) end
+	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEDOWNDEFENSE)
+	local g=Duel.SelectTarget(tp,s.filter,tp,LOCATION_MZONE,0,1,1,nil,tp,fg)
+	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,1,0,0)
+end
+function s.activate(e,tp,eg,ep,ev,re,r,rp)
+	local tc=Duel.GetFirstTarget()
+	if tc and tc:IsRelateToEffect(e) and tc:IsFacedown() then
+		if Duel.ChangePosition(tc,POS_FACEUP_DEFENSE)~=0 then
+		    local e1=Effect.CreateEffect(e:GetHandler())
+          	    e1:SetType(EFFECT_TYPE_SINGLE)
+   	 	    e1:SetCode(EFFECT_CANNOT_TRIGGER)
+	            e1:SetReset(RESET_EVENT+RESETS_STANDARD)
+    		    tc:RegisterEffect(e1)
+                    local fg=Duel.GetMatchingGroup(aux.FaceupFilter(Card.IsCanBeLinkMaterial),tp,LOCATION_MZONE,0,nil)
+		    local tg=Duel.GetMatchingGroup(s.linkfilter,tp,LOCATION_EXTRA,0,nil,tc,fg)
+        	    if #tg>0 then
+       		        Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
+       		        local sg=tg:Select(tp,1,1,nil)
+       		        local sc=sg:GetFirst()
+      	 	        Duel.LinkSummon(tp,sc,tc,nil)
+     	           end
+             end
+	end
+end