--刻まれし魔の憐歌
local s,id,o=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCondition(aux.bpcon)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--special summon
	local e2=Effect.CreateEffect(c)
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_FUSION_SUMMON)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCode(EVENT_FREE_CHAIN)
	e2:SetCountLimit(1,id)
	e2:SetCost(aux.bfgcost)
	e2:SetTarget(s.fstg)
	e2:SetOperation(s.fsop)
	c:RegisterEffect(e2)
end
s.fusion_effect=true
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetFlagEffect(tp,id)==0 end
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
	e1:SetTargetRange(LOCATION_MZONE,0)
	e1:SetReset(RESET_PHASE+PHASE_END)
	e1:SetTarget(s.ptfilter)
	e1:SetValue(1)
	Duel.RegisterEffect(e1,tp)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_CHANGE_BATTLE_DAMAGE)
	e2:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e2:SetTargetRange(1,0)
	e2:SetValue(HALF_DAMAGE)
	e2:SetReset(RESET_PHASE+PHASE_END)
	Duel.RegisterEffect(e2,tp)
	Duel.RegisterFlagEffect(tp,id,RESET_PHASE+PHASE_END,0,1)
end
function s.ptfilter(e,c)
	return c:IsAttribute(ATTRIBUTE_LIGHT) and c:IsRace(RACE_FIEND)
end
function s.mttg(e,c)
	local tc=c:GetEquipTarget()
	return tc and tc:IsFaceup() and tc:IsSetCard(0x1b0) and c:GetOriginalType()&TYPE_MONSTER~=0
end
function s.fuslimit(e,c,sumtype)
	if not c then return false end
	return c:IsControler(e:GetHandlerPlayer())
end
function s.filter(c,e,tp,m,f,chkf)
	return c:IsSetCard(0x1b0) and c:IsType(TYPE_FUSION) and (not f or f(c))
		and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_FUSION,tp,false,false) and c:CheckFusionMaterial(m,nil,chkf)
end
function s.filter2(c,e)
	return not c:IsImmuneToEffect(e)
end
function s.fstg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		local me=Effect.CreateEffect(e:GetHandler())
		me:SetType(EFFECT_TYPE_FIELD)
		me:SetCode(EFFECT_EXTRA_FUSION_MATERIAL)
		me:SetTargetRange(LOCATION_SZONE,0)
		me:SetTarget(s.mttg)
		me:SetValue(s.fuslimit)
		Duel.RegisterEffect(me,tp)
		local chkf=tp
		local mg1=Duel.GetFusionMaterial(tp):Filter(Card.IsOnField,nil)
		local res=Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_EXTRA,0,1,nil,e,tp,mg1,nil,chkf)
		if not res then
			local ce=Duel.GetChainMaterial(tp)
			if ce~=nil then
				local fgroup=ce:GetTarget()
				local mg3=fgroup(ce,e,tp)
				local mf=ce:GetValue()
				res=Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_EXTRA,0,1,nil,e,tp,mg3,mf,chkf)
			end
		end
		me:Reset()
		return res
	end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.fsop(e,tp,eg,ep,ev,re,r,rp)
	local me=Effect.CreateEffect(e:GetHandler())
	me:SetType(EFFECT_TYPE_FIELD)
	me:SetCode(EFFECT_EXTRA_FUSION_MATERIAL)
	me:SetTargetRange(LOCATION_SZONE,0)
	me:SetTarget(s.mttg)
	me:SetValue(s.fuslimit)
	Duel.RegisterEffect(me,tp)
	local chkf=tp
	local mg1=Duel.GetFusionMaterial(tp):Filter(Card.IsOnField,nil):Filter(s.filter2,nil,e)
	local sg1=Duel.GetMatchingGroup(s.filter,tp,LOCATION_EXTRA,0,nil,e,tp,mg1,nil,chkf)
	local mg3=nil
	local sg2=nil
	local ce=Duel.GetChainMaterial(tp)
	if ce~=nil then
		local fgroup=ce:GetTarget()
		mg3=fgroup(ce,e,tp)
		local mf=ce:GetValue()
		sg2=Duel.GetMatchingGroup(s.filter,tp,LOCATION_EXTRA,0,nil,e,tp,mg3,mf,chkf)
	end
	if sg1:GetCount()>0 or (sg2~=nil and sg2:GetCount()>0) then
		local sg=sg1:Clone()
		if sg2 then sg:Merge(sg2) end
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local tg=sg:Select(tp,1,1,nil)
		local tc=tg:GetFirst()
		if sg1:IsContains(tc) and (sg2==nil or not sg2:IsContains(tc) or ce and not Duel.SelectYesNo(tp,ce:GetDescription())) then
			local mat1=Duel.SelectFusionMaterial(tp,tc,mg1,nil,chkf)
			tc:SetMaterial(mat1)
			Duel.SendtoGrave(mat1,REASON_EFFECT+REASON_MATERIAL+REASON_FUSION)
			Duel.BreakEffect()
			Duel.SpecialSummon(tc,SUMMON_TYPE_FUSION,tp,tp,false,false,POS_FACEUP)
		elseif ce~=nil then
			local mat2=Duel.SelectFusionMaterial(tp,tc,mg3,nil,chkf)
			local fop=ce:GetOperation()
			fop(ce,e,tp,tc,mat2)
		end
		tc:CompleteProcedure()
	end
	me:Reset()
end