Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can discard this card; Special Summon 1 "The Agent" monster from your hand or GY, except "The Agent of Life - Neptune", or, if "The Sanctuary in the Sky" is on the field or in either GY, you can Special Summon 1 "Hyperion" monster instead. Neither player can Tribute a monster Summoned with this effect, until the end of your opponent's turn. If this card is banished: You can add 1 "The Sanctuary in the Sky" from your Deck to your hand. You can only use each effect of "The Agent of Life - Neptune" once per turn.
--命の代行者 ネプチューン
--The Agent of Life - Neptune
--Scripted by Hatter
local s,id=GetID()
function s.initial_effect(c)
	--Special Summon from hand or GY
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCost(Cost.SelfDiscard)
	e1:SetTarget(s.sptg)
	e1:SetOperation(s.spop)
	c:RegisterEffect(e1)
	--Add "The Sanctuary in the Sky" to hand
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_SEARCH+CATEGORY_TOHAND)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP)
	e2:SetCode(EVENT_REMOVE)
	e2:SetCountLimit(1,{id,1})
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_THE_AGENT,SET_HYPERION}
s.listed_names={CARD_SANCTUARY_SKY}
function s.spfilter(c,e,tp,sanc)
	return ((c:IsSetCard(SET_THE_AGENT) and not c:IsCode(id)) or (sanc and c:IsSetCard(SET_HYPERION))) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then
		local sanc=Duel.IsEnvironment(CARD_SANCTUARY_SKY)
			or Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsCode,CARD_SANCTUARY_SKY),e:GetHandlerPlayer(),LOCATION_ONFIELD|LOCATION_GRAVE,LOCATION_ONFIELD|LOCATION_GRAVE,1,nil)
		return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
			and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_GRAVE|LOCATION_HAND,0,1,nil,e,tp,sanc)
	end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_GRAVE|LOCATION_HAND)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.GetLocationCount(tp,LOCATION_MZONE)<1 then return end
	local sanc=Duel.IsEnvironment(CARD_SANCTUARY_SKY)
		or Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsCode,CARD_SANCTUARY_SKY),e:GetHandlerPlayer(),LOCATION_ONFIELD|LOCATION_GRAVE,LOCATION_ONFIELD|LOCATION_GRAVE,1,nil)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local tc=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.spfilter),tp,LOCATION_GRAVE|LOCATION_HAND,0,1,1,nil,e,tp,sanc):GetFirst()
	if tc then
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)
		--Cannot be tributed
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetDescription(3303)
		e1:SetProperty(EFFECT_FLAG_CLIENT_HINT)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_UNRELEASABLE_SUM)
		e1:SetValue(1)
		e1:SetReset(RESETS_STANDARD_DISABLE_PHASE_END,2)
		tc:RegisterEffect(e1)
		local e2=Effect.CreateEffect(e:GetHandler())
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_UNRELEASABLE_NONSUM)
		e2:SetValue(1)
		e2:SetReset(RESETS_STANDARD_DISABLE_PHASE_END,2)
		tc:RegisterEffect(e2)
	end
end
function s.thfilter(c)
	return c:IsCode(CARD_SANCTUARY_SKY) and c:IsAbleToHand()
end
function s.thtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.thop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end