--希望の天啓
local s,id,o=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id+EFFECT_COUNT_CODE_OATH)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.spfilter(c,e,tp,lc)
	return c:IsType(TYPE_XYZ) and c:IsRace(RACE_DRAGON) and c:IsRank(8) and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_XYZ,tp,false,false) and Duel.GetLocationCountFromEx(tp,tp,lc,c)>0
end
function s.costfilter(c,e,tp)
	return c:IsFaceup() and c:IsRace(RACE_DRAGON) and c:IsLevel(8) and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_EXTRA,0,1,nil,e,tp,c)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckReleaseGroup(tp,s.costfilter,1,nil,e,tp) end
	local g=Duel.SelectReleaseGroup(tp,s.costfilter,1,1,nil,e,tp)
	Duel.SendtoGrave(g,REASON_COST)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return aux.MustMaterialCheck(nil,tp,EFFECT_MUST_BE_XMATERIAL)
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_EXTRA,0,1,nil,e,tp,nil) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	if not aux.MustMaterialCheck(nil,tp,EFFECT_MUST_BE_XMATERIAL) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local tc=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_EXTRA,0,1,1,nil,e,tp,nil):GetFirst()
	if not tc then return end
	tc:SetMaterial(nil)
	Duel.SpecialSummon(tc,SUMMON_TYPE_XYZ,tp,tp,false,false,POS_FACEUP)
end