--ヴァレルロード・X・ドラゴン
function c6247535.initial_effect(c)
	--xyz summon
	aux.AddXyzProcedure(c,c6247535.mfilter,4,2)
	c:EnableReviveLimit()
	--cannot be target
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_CANNOT_BE_EFFECT_TARGET)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCondition(c6247535.econ)
	e1:SetValue(c6247535.efilter)
	c:RegisterEffect(e1)
	--atk down
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(6247535,0))
	e2:SetCategory(CATEGORY_ATKCHANGE+CATEGORY_DEFCHANGE+CATEGORY_SPECIAL_SUMMON)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetRange(LOCATION_MZONE)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetCountLimit(1)
	e2:SetCost(c6247535.cost)
	e2:SetTarget(c6247535.target)
	e2:SetOperation(c6247535.operation)
	c:RegisterEffect(e2)
end
function c6247535.mfilter(c)
	return c:IsRace(RACE_DRAGON) and c:IsAttribute(ATTRIBUTE_DARK)
end
function c6247535.econ(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsSummonType(SUMMON_TYPE_XYZ)
end
function c6247535.efilter(e,re,rp)
	return re:GetHandler()~=e:GetHandler() and re:IsActiveType(TYPE_MONSTER)
end
function c6247535.cost(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 c6247535.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsFaceup() end
	if chk==0 then return Duel.IsExistingTarget(Card.IsFaceup,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TARGET)
	Duel.SelectTarget(tp,Card.IsFaceup,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
end
function c6247535.spfilter(c,e,tp)
	return c:IsSetCard(0x10f) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function c6247535.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() and tc:IsType(TYPE_MONSTER) and not tc:IsImmuneToEffect(e) then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(-600)
		e1:SetReset(RESET_EVENT+RESETS_STANDARD)
		tc:RegisterEffect(e1)
		local e2=e1:Clone()
		e2:SetCode(EFFECT_UPDATE_DEFENSE)
		tc:RegisterEffect(e2)
		local g=Duel.GetMatchingGroup(aux.NecroValleyFilter(c6247535.spfilter),tp,LOCATION_GRAVE,0,nil,e,tp)
		if g:GetCount()>0 and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
			and Duel.SelectYesNo(tp,aux.Stringid(6247535,1)) then
			Duel.BreakEffect()
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
			local tc=g:Select(tp,1,1,nil):GetFirst()
			Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
			local fid=c:GetFieldID()
			tc:RegisterFlagEffect(6247535,RESET_EVENT+RESETS_STANDARD,0,1,fid)
			local e3=Effect.CreateEffect(c)
			e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
			e3:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
			e3:SetCode(EVENT_PHASE+PHASE_END)
			e3:SetCountLimit(1)
			e3:SetLabel(fid)
			e3:SetLabelObject(tc)
			e3:SetCondition(c6247535.rmcon)
			e3:SetOperation(c6247535.rmop)
			Duel.RegisterEffect(e3,tp)
		end
	end
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetCode(EFFECT_CANNOT_SPECIAL_SUMMON)
	e1:SetReset(RESET_PHASE+PHASE_END)
	e1:SetTargetRange(1,0)
	Duel.RegisterEffect(e1,tp)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetCode(EFFECT_CANNOT_DIRECT_ATTACK)
	e2:SetProperty(EFFECT_FLAG_OATH+EFFECT_FLAG_IGNORE_IMMUNE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetReset(RESET_PHASE+PHASE_END)
	Duel.RegisterEffect(e2,tp)
end
function c6247535.rmcon(e,tp,eg,ep,ev,re,r,rp)
	if e:GetLabelObject():GetFlagEffectLabel(6247535)~=e:GetLabel() then
		e:Reset()
		return false
	else return true end
end
function c6247535.rmop(e,tp,eg,ep,ev,re,r,rp)
	local tc=e:GetLabelObject()
	Duel.Remove(tc,POS_FACEUP,REASON_EFFECT)
end
