Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
4 Level 5 monsters When this card is Special Summoned: You can target 1 Spell/Trap Card on the field; destroy that target. If this card has "Number 104: Masquerade" as an Xyz material, it gains this effect. ● Once per turn, during either player's turn, when a monster effect is activated on your opponent's side of the field: You can detach 1 Xyz Material from this card; negate the activation, then you can send 1 random card from your opponent's hand to the Graveyard, and if you do, halve your opponent's Life Points.
--CNo.104 仮面魔踏士アンブラル
--Number C104: Umbral Horror Masquerade
local s,id=GetID()
function s.initial_effect(c)
	--Xyz summon
	Xyz.AddProcedure(c,nil,5,4)
	c:EnableReviveLimit()
	--Destroy
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_DESTROY)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_SPSUMMON_SUCCESS)
	e1:SetTarget(s.destg)
	e1:SetOperation(s.desop)
	c:RegisterEffect(e1)
	--Negate activate
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_NEGATE+CATEGORY_HANDES)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetRange(LOCATION_MZONE)
	e2:SetCountLimit(1)
	e2:SetCode(EVENT_CHAINING)
	e2:SetCondition(s.condition)
	e2:SetCost(Cost.DetachFromSelf(1))
	e2:SetTarget(s.target)
	e2:SetOperation(s.operation)
	c:RegisterEffect(e2)
	aux.DoubleSnareValidity(c,LOCATION_MZONE)
end
s.xyz_number=104
s.listed_names={2061963}
function s.desfilter(c)
	return c:IsSpellTrap()
end
function s.destg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsOnField() and s.desfilter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.desfilter,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_DESTROY)
	local g=Duel.SelectTarget(tp,s.desfilter,tp,LOCATION_ONFIELD,LOCATION_ONFIELD,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_DESTROY,g,1,0,0)
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.Destroy(tc,REASON_EFFECT)
	end
end
function s.condition(e,tp,eg,ep,ev,re,r,rp,chk)
	local loc=Duel.GetChainInfo(ev,CHAININFO_TRIGGERING_LOCATION)
	return not e:GetHandler():IsStatus(STATUS_BATTLE_DESTROYED) and ep==1-tp
		and loc==LOCATION_MZONE and re:IsMonsterEffect() and Duel.IsChainNegatable(ev)
		and e:GetHandler():GetOverlayGroup():IsExists(Card.IsCode,1,nil,2061963)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	if Duel.NegateActivation(ev) and Duel.GetFieldGroupCount(1-tp,LOCATION_HAND,0)>0
		and Duel.SelectYesNo(tp,aux.Stringid(id,2)) then
		local g=Duel.GetFieldGroup(1-tp,LOCATION_HAND,0):RandomSelect(1-tp,1)
		Duel.SendtoGrave(g,REASON_EFFECT)
		Duel.SetLP(1-tp,Duel.GetLP(1-tp)/2)
	end
end