--Lich-Lord's Cursed Fusion
local cid,id=GetID()
function cid.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_FUSION_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id)
	e1:SetTarget(cid.sptg)
	e1:SetOperation(cid.spop)
	c:RegisterEffect(e1)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_PHASE+PHASE_BATTLE_START)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,id+1000)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetCategory(CATEGORY_ATKCHANGE)
	e2:SetCondition(function(e,tp) return Duel.GetTurnPlayer()==tp and Duel.IsExistingMatchingCard(Card.IsCode,tp,LOCATION_GRAVE,0,1,nil,91630827) and aux.exccon(e) end)
	e2:SetCost(aux.bfgcost)
	e2:SetTarget(cid.tg)
	e2:SetOperation(cid.op)
	c:RegisterEffect(e2)
end
function cid.mfilter0(c)
	return c:IsRace(RACE_ZOMBIE) and c:IsType(TYPE_MONSTER) and c:IsCanBeFusionMaterial() and c:IsAbleToRemove()
end
function cid.mfilter1(c,e)
	return c:IsRace(RACE_ZOMBIE) and c:IsType(TYPE_MONSTER) and not c:IsImmuneToEffect(e)
end
function cid.mfilter2(c,e)
	return c:IsRace(RACE_ZOMBIE) and c:IsType(TYPE_MONSTER) and c:IsCanBeFusionMaterial() and c:IsAbleToRemove() and not c:IsImmuneToEffect(e)
end
function cid.spfilter1(c,e,tp,m,f,chkf)
	return c:IsType(TYPE_FUSION) and c:IsRace(RACE_ZOMBIE) and (not f or f(c))
		and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_FUSION,tp,false,false) and c:CheckFusionMaterial(m,nil,chkf)
end
function cid.spfilter2(c,e,tp,m,f,chkf)
	return c:IsType(TYPE_FUSION) and c:IsRace(RACE_ZOMBIE) and c:IsSetCard(0x2e7) and (not f or f(c))
		and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_FUSION,tp,false,false) and c:CheckFusionMaterial(m,nil,chkf)
end
function cid.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		local chkf=tp
		local mg=Duel.GetFusionMaterial(tp)
		local mg1=mg:Filter(Card.IsOnField,nil)
		local res=Duel.IsExistingMatchingCard(cid.spfilter1,tp,LOCATION_EXTRA,0,1,nil,e,tp,mg1,nil,chkf)
		if res then return true end
		local mg2=Duel.GetMatchingGroup(cid.mfilter0,tp,LOCATION_GRAVE,LOCATION_GRAVE,nil)
		mg2:Merge(mg1)
		res=Duel.IsExistingMatchingCard(cid.spfilter2,tp,LOCATION_EXTRA,0,1,nil,e,tp,mg2,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(cid.spfilter1,tp,LOCATION_EXTRA,0,1,nil,e,tp,mg3,mf,chkf)
			end
		end
		return res
	end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function cid.spop(e,tp,eg,ep,ev,re,r,rp)
	local chkf=tp
	local mg1=Duel.GetFusionMaterial(tp):Filter(Card.IsOnField,nil):Filter(cid.mfilter1,nil,e)
	local sg1=Duel.GetMatchingGroup(cid.spfilter1,tp,LOCATION_EXTRA,0,nil,e,tp,mg1,nil,chkf)
	local mg2=Duel.GetMatchingGroup(cid.mfilter2,tp,LOCATION_GRAVE,LOCATION_GRAVE,nil,e)
	mg2:Merge(mg1)
	local sg2=Duel.GetMatchingGroup(cid.spfilter2,tp,LOCATION_EXTRA,0,nil,e,tp,mg2,nil,chkf)
	sg1:Merge(sg2)
	local mg3=nil
	local sg3=nil
	local ce=Duel.GetChainMaterial(tp)
	if ce~=nil then
		local fgroup=ce:GetTarget()
		mg3=fgroup(ce,e,tp)
		local mf=ce:GetValue()
		sg3=Duel.GetMatchingGroup(cid.spfilter1,tp,LOCATION_EXTRA,0,nil,e,tp,mg3,mf,chkf)
	end
	if sg1:GetCount()>0 or (sg3~=nil and sg3:GetCount()>0) then
		local sg=sg1:Clone()
		if sg3 then sg:Merge(sg3) 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 (sg3==nil or not sg3:IsContains(tc) or not Duel.SelectYesNo(tp,ce:GetDescription())) then
			if tc:IsSetCard(0x2e7) then
				local mat1=Duel.SelectFusionMaterial(tp,tc,mg2,nil,chkf)
				tc:SetMaterial(mat1)
				local mat2=mat1:Filter(Card.IsLocation,nil,LOCATION_GRAVE)
				mat1:Sub(mat2)
				Duel.SendtoGrave(mat1,REASON_EFFECT+REASON_MATERIAL+REASON_FUSION)
				Duel.Remove(mat2,POS_FACEUP,REASON_EFFECT+REASON_MATERIAL+REASON_FUSION)
			else
				local mat2=Duel.SelectFusionMaterial(tp,tc,mg1,nil,chkf)
				tc:SetMaterial(mat2)
				Duel.SendtoGrave(mat2,REASON_EFFECT+REASON_MATERIAL+REASON_FUSION)
			end
			Duel.BreakEffect()
			Duel.SpecialSummon(tc,SUMMON_TYPE_FUSION,tp,tp,false,false,POS_FACEUP)
		else
			local mat=Duel.SelectFusionMaterial(tp,tc,mg3,nil,chkf)
			local fop=ce:GetOperation()
			fop(ce,e,tp,tc,mat)
		end
		tc:CompleteProcedure()
	end
end
function cid.filter(c)
	return c:IsFaceup() and c:IsRace(RACE_ZOMBIE) and c:IsType(TYPE_FUSION)
end
function cid.tg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and cid.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(cid.filter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,cid.filter,tp,LOCATION_MZONE,0,1,1,nil)
end
function cid.op(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_CHANGE_DAMAGE)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetTargetRange(0,1)
	e1:SetValue(function(e,re,val) return val//2 end)
	e1:SetReset(RESET_PHASE+PHASE_END)
	Duel.RegisterEffect(e1,tp)
	local tc=Duel.GetFirstTarget()
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_CANNOT_ATTACK)
	e1:SetProperty(EFFECT_FLAG_OATH)
	e1:SetTargetRange(LOCATION_MZONE,0)
	e1:SetTarget(function(e,ec) return tc:GetFieldID()~=ec:GetFieldID() end)
	e1:SetReset(RESET_PHASE+PHASE_END)
	Duel.RegisterEffect(e1,tp)
	if tc:IsFaceup() and tc:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_EXTRA_ATTACK)
		e1:SetValue(2)
		e1:SetReset(RESET_EVENT+RESETS_STANDARD+RESET_PHASE+PHASE_END)
		c:RegisterEffect(e1)
		local e2=Effect.CreateEffect(c)
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_UPDATE_ATTACK)
		e2:SetValue(tc:GetDefense())
		e2:SetReset(RESET_EVENT+RESETS_STANDARD+RESET_PHASE+PHASE_END)
		tc:RegisterEffect(e2)
	end
end