--四天の龍ダーク・リベリオン・エクシーズ・ドラゴン
local s,id,o=GetID()
function s.initial_effect(c)
	--xyz summon
	aux.AddXyzProcedure(c,aux.FilterBoolFunction(Card.IsAttribute,ATTRIBUTE_DARK),4,2)
	c:EnableReviveLimit()
	--destroy
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_CARD_TARGET)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
	--disable
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetCode(EVENT_CHAINING)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1,id+o)
	e2:SetCondition(s.spcon)
	e2:SetCost(s.spcost)
	e2:SetTarget(s.sptg)
	e2:SetOperation(s.spop)
	c:RegisterEffect(e2)
end
function s.desfilter(c,e)
	return c:IsCanBeEffectTarget(e)
end
function s.gcheck(g,tp)
	return g:FilterCount(Card.IsControler,nil,tp)==g:FilterCount(Card.IsControler,nil,1-tp)
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local g=Duel.GetMatchingGroup(s.desfilter,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,nil,e)
	if chkc then return false end
	if chk==0 then return g:CheckSubGroup(s.gcheck,2,2,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local sg=g:SelectSubGroup(tp,s.gcheck,false,2,24,tp)
	Duel.SetTargetCard(sg)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,sg,sg:GetCount(),0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local sg=Duel.GetTargetsRelateToChain():Filter(Card.IsOnField,nil)
	Duel.Destroy(sg,REASON_EFFECT)
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return ep==1-tp
end
function s.spcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():CheckRemoveOverlayCard(tp,1,REASON_COST) end
	e:GetHandler():RemoveOverlayCard(tp,1,1,REASON_COST)
end
function s.spfilter(c,e,tp,mc)
	return c:IsAttribute(ATTRIBUTE_DARK) and c:IsRank(4) and c:IsType(TYPE_XYZ) and mc:IsCanBeXyzMaterial(c)
		and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_XYZ,tp,false,false) and Duel.GetLocationCountFromEx(tp,tp,mc,c)>0
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return aux.MustMaterialCheck(c,tp,EFFECT_MUST_BE_XMATERIAL)
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_EXTRA,0,1,nil,e,tp,c) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not aux.MustMaterialCheck(c,tp,EFFECT_MUST_BE_XMATERIAL) then return end
	if c:IsFaceup() and c:IsRelateToChain() and c:IsControler(tp) and not c:IsImmuneToEffect(e) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_EXTRA,0,1,1,nil,e,tp,c)
		local sc=g:GetFirst()
		if sc then
			local mg=c:GetOverlayGroup()
			if mg:GetCount()~=0 then
				Duel.Overlay(sc,mg)
			end
			sc:SetMaterial(Group.FromCards(c))
			Duel.Overlay(sc,Group.FromCards(c))
			Duel.SpecialSummon(sc,SUMMON_TYPE_XYZ,tp,tp,false,false,POS_FACEUP)
			sc:CompleteProcedure()
		end
	end
end
