Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Once per turn: You can Tribute 1 or more "Vendread" monsters from your hand and/or field, then target 1 face-up monster you control; increase its Level by the number of monsters Tributed, until the end of this turn. When your attacking "Vendread" Ritual Monster destroys an opponent's monster by battle: You can have your monster gain 1000 ATK. You can only use this effect of "Vendread Nightmare" once per turn.
--ヴェンデット・ナイトメア
--Vendread Nightmare
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e1)
	--Increase the level of 1 face-up monster you control by the number of monsters Tributed
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_LVCHANGE)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCountLimit(1)
	e2:SetCost(s.lvcost)
	e2:SetTarget(s.lvtg)
	e2:SetOperation(s.lvop)
	c:RegisterEffect(e2)
	--You attacking "Vendread" Ritual Monster gains 1000 ATK
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_ATKCHANGE)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_BATTLE_DESTROYING)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCountLimit(1,id)
	e3:SetCondition(s.atkcon)
	e3:SetOperation(s.atkop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_VENDREAD}
function s.lvcfilter(c)
	return c:IsMonster() and c:IsSetCard(SET_VENDREAD)
end
function s.lvfilter(c,e)
	return c:IsFaceup() and c:IsLevelAbove(1) and (not e or c:IsCanBeEffectTarget(e))
end
function s.lvcost(e,tp,eg,ep,ev,re,r,rp,chk)
	local tg=Duel.GetMatchingGroup(s.lvfilter,tp,LOCATION_MZONE,0,nil,e)
	if chk==0 then return Duel.CheckReleaseGroupCost(tp,s.lvcfilter,1,true,aux.ReleaseCheckTarget,nil,tg) end
	local g=Duel.SelectReleaseGroupCost(tp,s.lvcfilter,1,99,true,aux.ReleaseCheckTarget,nil,tg)
	e:SetLabel(#g)
	Duel.Release(g,REASON_COST)
end
function s.lvtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and s.lvfilter(chkc) end
	if chk==0 then return true end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_APPLYTO)
	local g=Duel.SelectTarget(tp,s.lvfilter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_LVCHANGE,g,1,tp,e:GetLabel())
end
function s.lvop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if c:IsRelateToEffect(e) and tc:IsFaceup() and tc:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_LEVEL)
		e1:SetValue(e:GetLabel())
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		tc:RegisterEffect(e1)
	end
end
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	local a=Duel.GetAttacker()
	return a:IsControler(tp) and (a:IsRitualMonster() and a:IsSetCard(SET_VENDREAD)) and a:GetBattleTarget():IsControler(1-tp)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetAttacker()
	if c:IsRelateToEffect(e) and tc:IsRelateToBattle() and tc:IsFaceup() then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(1000)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1)
	end
end