Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If a face-up monster(s) you control is destroyed by battle or card effect, except Ritual Monsters: You can Special Summon 1 "Skull Guardian" from your hand or Deck. You can send this face-up card to the GY, then target 1 Ritual Monster you control; it gains ATK equal to the combined original ATK of the other monsters currently on the field, until the end of this turn. You can only use each effect of "Guardian of the Voiceless Voice" once per turn, and cannot activate more than 1 in the same Chain.
--粛声のガーディアン
--Guardian of the Voiceless Voice
--scripted by Naim
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e0=Effect.CreateEffect(c)
	e0:SetType(EFFECT_TYPE_ACTIVATE)
	e0:SetCode(EVENT_FREE_CHAIN)
	c:RegisterEffect(e0)
	--Special Summon 1 "Skull Guardian" from your hand or Deck
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e1:SetCode(EVENT_DESTROYED)
	e1:SetRange(LOCATION_SZONE)
	e1:SetCountLimit(1,id)
	e1:SetCondition(s.spcon)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--Increase the ATK of 1 Ritual Monster you control
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_ATKCHANGE)
	e2:SetType(EFFECT_TYPE_QUICK_O)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET+EFFECT_FLAG_DAMAGE_STEP)
	e2:SetCode(EVENT_FREE_CHAIN)
	e2:SetRange(LOCATION_SZONE)
	e2:SetHintTiming(TIMING_DAMAGE_STEP)
	e2:SetCountLimit(1,{id,1})
	e2:SetCondition(function() return not (Duel.IsPhase(PHASE_DAMAGE) and Duel.IsDamageCalculated()) end)
	e2:SetCost(s.atkcost)
	e2:SetTarget(s.atktg)
	e2:SetOperation(s.atkop)
	c:RegisterEffect(e2)
end
s.listed_names={3627449} --"Skull Guardian"
function s.spconfilter(c,tp)
	return c:IsReason(REASON_BATTLE|REASON_EFFECT) and c:IsPreviousLocation(LOCATION_MZONE) and c:IsPreviousControler(tp)
		and (c:IsPreviousPosition(POS_FACEDOWN) or not c:IsPreviousTypeOnField(TYPE_RITUAL))
end
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	return eg:IsExists(s.spconfilter,1,nil,tp)
end
function s.spfilter(c,e,tp)
	return c:IsCode(3627449) and c:IsCanBeSpecialSummoned(e,0,tp,false,true)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return not Duel.HasFlagEffect(tp,id) and Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_HAND|LOCATION_DECK,0,1,nil,e,tp) end
	Duel.RegisterFlagEffect(tp,id,RESET_CHAIN,0,1)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_HAND|LOCATION_DECK)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectMatchingCard(tp,s.spfilter,tp,LOCATION_HAND|LOCATION_DECK,0,1,1,nil,e,tp)
	if #g>0 then
		Duel.SpecialSummon(g,0,tp,tp,false,true,POS_FACEUP)
	end
end
function s.atkcost(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsAbleToGraveAsCost() and c:IsStatus(STATUS_EFFECT_ENABLED) end
	Duel.SendtoGrave(c,REASON_COST)
end
function s.atkfilter(c)
	return c:IsRitualMonster() and c:IsFaceup()
		and Duel.IsExistingMatchingCard(aux.FaceupFilter(aux.NOT(Card.IsBaseAttack),0),0,LOCATION_MZONE,LOCATION_MZONE,1,c)
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 s.atkfilter(chkc) end
	if chk==0 then return not Duel.HasFlagEffect(tp,id)
		and Duel.IsExistingTarget(s.atkfilter,tp,LOCATION_MZONE,0,1,nil) end
	Duel.RegisterFlagEffect(tp,id,RESET_CHAIN,0,1)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATKDEF)
	local g=Duel.SelectTarget(tp,s.atkfilter,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_ATKCHANGE,g:GetFirst(),1,tp,0)
end
function s.atkop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() then
		local g=Duel.GetMatchingGroup(Card.IsFaceup,tp,LOCATION_MZONE,LOCATION_MZONE,tc)
		if #g==0 then return end
		local atk=g:GetSum(Card.GetBaseAttack,nil)
		--Gains ATK equal to the total original ATK of all other monsters on the field, until the end of this turn
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UPDATE_ATTACK)
		e1:SetValue(atk)
		e1:SetReset(RESETS_STANDARD_PHASE_END)
		tc:RegisterEffect(e1)
	end
end