Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
If this card is Normal or Special Summoned: You can send 1 Level 4 or lower "Magnet Warrior" monster from your Deck to the GY, except "Epsilon The Magnet Warrior"; this card's name becomes the sent monster's name (until the End Phase), then you can Special Summon 1 "Magnet Warrior" or "Magna Warrior" monster from your GY with a different name than the cards you control. You can only use this effect of "Epsilon The Magnet Warrior" once per turn.
--磁石の戦士ε
--Epsilon The Magnet Warrior
--Scripted by Larry126
local s,id=GetID()
function s.initial_effect(c)
	--Name changing and Special Summon
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e1:SetProperty(EFFECT_FLAG_DELAY+EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetCountLimit(1,id)
	e1:SetTarget(s.target)
	e1:SetCost(s.cost)
	e1:SetOperation(s.operation)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e2)
end
s.listed_names={id}
s.listed_series={SET_MAGNET_WARRIOR,SET_MAGNA_WARRIOR}
function s.cfilter(c,code)
	return c:IsMonster() and c:IsLevelBelow(4) and c:IsSetCard(SET_MAGNET_WARRIOR)
		and not c:IsCode(id,code) and c:IsAbleToGraveAsCost()
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_DECK,0,1,nil,e:GetHandler():GetCode()) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TOGRAVE)
	local tc=Duel.SelectMatchingCard(tp,s.cfilter,tp,LOCATION_DECK,0,1,1,nil,e:GetHandler():GetCode()):GetFirst()
	Duel.SendtoGrave(tc,REASON_COST)
	e:SetLabel(tc:GetCode())
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	Duel.SetPossibleOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_GRAVE)
end
function s.spfilter(c,e,tp)
	return (c:IsSetCard(SET_MAGNET_WARRIOR) or c:IsSetCard(SET_MAGNA_WARRIOR)) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
		and not Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsCode,c:GetCode()),tp,LOCATION_ONFIELD,0,1,nil)
end
function s.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if not (c:IsRelateToEffect(e) and c:IsFaceup()) then return end
	--Change name
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetCode(EFFECT_CHANGE_CODE)
	e1:SetReset(RESETS_STANDARD_PHASE_END)
	e1:SetValue(e:GetLabel())
	c:RegisterEffect(e1)
	if c:IsImmuneToEffect(e) or Duel.GetLocationCount(tp,LOCATION_MZONE)<=0 then return end
	local sg=Duel.GetMatchingGroup(aux.NecroValleyFilter(s.spfilter),tp,LOCATION_GRAVE,0,nil,e,tp)
	if #sg>0 and Duel.SelectYesNo(tp,aux.Stringid(id,1)) then
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
		local sc=sg:Select(tp,1,1,nil)
		if #sc==0 then return end
		Duel.BreakEffect()
		Duel.SpecialSummon(sc,0,tp,tp,false,false,POS_FACEUP)
	end
end