Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When your opponent Normal or Special Summons a monster(s): Target 1 of those monsters and 1 Spellcaster monster you control; send both monsters to the GY, then you can Special Summon 1 DARK Spellcaster monster from your Deck or GY.
--黒魔族復活の棺
--Dark Renewal
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_TOGRAVE+CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e2)
end
function s.filter1(c,e,tp)
	return c:IsSummonPlayer(1-tp) and c:IsLocation(LOCATION_MZONE) and c:IsCanBeEffectTarget(e)
		and Duel.IsExistingTarget(aux.FaceupFilter(Card.IsRace,RACE_SPELLCASTER),tp,LOCATION_MZONE,0,1,c)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return false end
	if chk==0 then return eg and eg:IsExists(s.filter1,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g1=eg:FilterSelect(tp,s.filter1,1,1,nil,e,tp)
	Duel.SetTargetCard(g1)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local g2=Duel.SelectTarget(tp,aux.FaceupFilter(Card.IsRace,RACE_SPELLCASTER),tp,LOCATION_MZONE,0,1,1,g1:GetFirst())
	g1:Merge(g2)
	Duel.SetOperationInfo(0,CATEGORY_TOGRAVE,g1,2,0,0)
	Duel.SetPossibleOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,0,tp,LOCATION_DECK|LOCATION_GRAVE)
end
function s.spfilter(c,e,tp)
	return c:IsRace(RACE_SPELLCASTER) and c:IsAttribute(ATTRIBUTE_DARK) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetTargetCards(e)
	if #g==2 and Duel.SendtoGrave(g,REASON_EFFECT)==2 and g:IsExists(Card.IsLocation,2,nil,LOCATION_GRAVE) then
		if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
		local sg=Duel.GetMatchingGroup(aux.NecroValleyFilter(s.spfilter),tp,LOCATION_DECK|LOCATION_GRAVE,0,nil,e,tp)
		if #sg>0 and Duel.SelectYesNo(tp,aux.Stringid(id,0)) then
			Duel.BreakEffect()
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
			local tg=sg:Select(tp,1,1,nil)
			Duel.SpecialSummon(tg,0,tp,tp,false,false,POS_FACEUP)
		end
	end
end