Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
2 Level 8 monsters Once per turn, when a Spell Card or effect is activated on the field (Quick Effect): You can negate that effect, and if you do, attach that card to this card as material. When an opponent's monster declares an attack: You can detach 1 material from this card; change the attack target to this card and perform damage calculation. If another face-up Xyz Monster(s) you control is destroyed by battle or card effect: You can target 1 face-up Xyz Monster you control; it gains ATK equal to 1 of those destroyed monster's original ATK.
--Ｎｏ．３８ 希望魁竜タイタニック・ギャラクシー
--Number 38: Hope Harbinger Dragon Titanic Galaxy
local s,id=GetID()
function s.initial_effect(c)
	c:EnableReviveLimit()
	--Xyz Summon procedure
	Xyz.AddProcedure(c,nil,8,2)
	--Negate an activated Spell Card or effect
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DISABLE)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_CHAINING)
	e1:SetCountLimit(1)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCondition(s.discon)
	e1:SetTarget(s.distg)
	e1:SetOperation(s.disop)
	c:RegisterEffect(e1)
	--Change the attack target to this card
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_ATTACK_ANNOUNCE)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCondition(function(e,tp) return Duel.GetAttacker():IsControler(1-tp) and Duel.GetAttackTarget()~=e:GetHandler() end)
	e2:SetCost(Cost.DetachFromSelf(1,1,nil))
	e2:SetOperation(s.chngtgop)
	c:RegisterEffect(e2)
	--Make 1 of your Xyz monsters gain ATK
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,2))
	e3:SetCategory(CATEGORY_ATKCHANGE)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e3:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e3:SetCode(EVENT_DESTROYED)
	e3:SetRange(LOCATION_MZONE)
	e3:SetCondition(s.atkcon)
	e3:SetTarget(s.atktg)
	e3:SetOperation(s.atkop)
	c:RegisterEffect(e3)
end
s.xyz_number=38
function s.discon(e,tp,eg,ep,ev,re,r,rp)
	local loc=Duel.GetChainInfo(ev,CHAININFO_TRIGGERING_LOCATION)
	return (loc&LOCATION_SZONE)>0 and re:IsSpellEffect() and Duel.IsChainDisablable(ev)
end
function s.distg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_DISABLE,eg,1,0,0)
end
function s.disop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local rc=re:GetHandler()
	if Duel.NegateEffect(ev) and c:IsRelateToEffect(e) and rc:IsRelateToEffect(re) and c:IsType(TYPE_XYZ) and rc:IsCanBeXyzMaterial(c,tp,REASON_EFFECT) then
		rc:CancelToGrave()
		Duel.Overlay(c,rc,true)
	end
end
function s.chngtgop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not c:IsRelateToEffect(e) then return end
	local at=Duel.GetAttacker()
	if at:CanAttack() and not at:IsImmuneToEffect(e) then
		Duel.CalculateDamage(at,c)
	end
end
function s.atkconfilter(c,tp)
	return c:IsReason(REASON_BATTLE|REASON_EFFECT) and c:IsType(TYPE_XYZ) and c:GetBaseAttack()>0 and c:IsPreviousPosition(POS_FACEUP)
		and c:IsPreviousLocation(LOCATION_MZONE) and c:IsPreviousControler(tp)
end
function s.atkcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.atkconfilter,1,nil,tp)
end
function s.atktg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and chkc:IsControler(tp) and chkc:IsType(TYPE_XYZ) and chkc:IsFaceup() end
	if chk==0 then return eg:IsExists(s.atkconfilter,1,nil,tp)
		and Duel.IsExistingTarget(aux.FaceupFilter(Card.IsType,TYPE_XYZ),tp,LOCATION_MZONE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATKDEF)
	Duel.SelectTarget(tp,aux.FaceupFilter(Card.IsType,TYPE_XYZ),tp,LOCATION_MZONE,0,1,1,nil)
	local mg=eg:Filter(s.atkconfilter,nil,tp)
	mg:KeepAlive()
	e:SetLabelObject(mg)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if not (tc:IsFaceup() and tc:IsRelateToEffect(e)) then return end
	local g=e:GetLabelObject()
	if #g>=2 then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
		g=g:Select(tp,1,1,nil)
	end
	--Duel.HintSelection(g)
	--Gains ATK equal to 1 of those destroyed monster's original ATK
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(g:GetFirst():GetBaseAttack())
	e1:SetReset(RESET_EVENT|RESETS_STANDARD)
	tc:RegisterEffect(e1)
end