Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
All "Nephthys" monsters you control gain 300 ATK. If this face-up card in the Spell & Trap Zone is destroyed by card effect and sent to the GY: You can Special Summon 1 "Nephthys" monster from your hand, Deck, or GY, but destroy it during the End Phase. You can only use this effect of "Awakening of Nephthys" once per turn.
--ネフティスの覚醒
--Awakening of Nephthys
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)
	--atkup
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetRange(LOCATION_SZONE)
	e2:SetTargetRange(LOCATION_MZONE,0)
	e2:SetCode(EFFECT_UPDATE_ATTACK)
	e2:SetTarget(aux.TargetBoolFunction(Card.IsSetCard,SET_NEPHTHYS))
	e2:SetValue(300)
	c:RegisterEffect(e2)
	--spaw
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_TO_GRAVE)
	e3:SetProperty(EFFECT_FLAG_DELAY)
	e3:SetCountLimit(1,id)
	e3:SetCondition(s.spcon)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_NEPHTHYS}
function s.spcon(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	return c:IsPreviousLocation(LOCATION_SZONE) and c:IsPreviousPosition(POS_FACEUP)
		and c:IsReason(REASON_DESTROY) and c:IsReason(REASON_EFFECT)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingMatchingCard(s.spfilter,tp,LOCATION_DECK|LOCATION_HAND|LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_DECK|LOCATION_HAND|LOCATION_GRAVE)
end
function s.spfilter(c,e,tp)
	return c:IsSetCard(SET_NEPHTHYS) and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
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_DECK|LOCATION_HAND|LOCATION_GRAVE,0,1,1,nil,e,tp)
	local tc=g:GetFirst()
	if tc and Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP)~=0 then
		local fid=e:GetHandler():GetFieldID()
		tc:RegisterFlagEffect(id,RESET_EVENT|RESETS_STANDARD,0,1,fid)
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
		e1:SetCode(EVENT_PHASE+PHASE_END)
		e1:SetCountLimit(1)
		e1:SetProperty(EFFECT_FLAG_IGNORE_IMMUNE)
		e1:SetLabel(fid)
		e1:SetLabelObject(tc)
		e1:SetCondition(s.descon)
		e1:SetOperation(s.desop)
		Duel.RegisterEffect(e1,tp)
	end
end
function s.descon(e,tp,eg,ep,ev,re,r,rp)
	local tc=e:GetLabelObject()
	if tc:GetFlagEffectLabel(id)~=e:GetLabel() then
		e:Reset()
		return false
	else return true end
end
function s.desop(e,tp,eg,ep,ev,re,r,rp)
	Duel.Destroy(e:GetLabelObject(),REASON_EFFECT)
end