Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Cannot be used as material for a Synchro or Xyz Summon, except for the Synchro or Xyz Summon of a "Magikey" monster. If you control a "Magikey" monster: You can reveal this card in your hand; you can Normal Summon 1 "Magikey" monster during your Main Phase this turn, in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) When this card is Normal Summoned: You can target 1 Level 4 or lower Normal Monster, or Level 4 or lower "Magikey" monster, in your GY; Special Summon it in Defense Position. You can only use this effect of "Maginificent Magikey Mafteal" once per turn.
--大魔鍵－マフテアル
--Maginificent Magikey Mafteal
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--mat limit
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_UNCOPYABLE+EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetCode(EFFECT_CANNOT_BE_SYNCHRO_MATERIAL)
	e1:SetValue(s.matlimit)
	c:RegisterEffect(e1)
	local e2=e1:Clone()
	e2:SetCode(EFFECT_CANNOT_BE_XYZ_MATERIAL)
	c:RegisterEffect(e2)
	--extra summon
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_HAND)
	e3:SetCondition(s.sumcon)
	e3:SetCost(s.sumcost)
	e3:SetTarget(s.sumtg)
	e3:SetOperation(s.sumop)
	c:RegisterEffect(e3)
	--special summon
	local e4=Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id,1))
	e4:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e4:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e4:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e4:SetCode(EVENT_SUMMON_SUCCESS)
	e4:SetCountLimit(1,id)
	e4:SetTarget(s.sptg)
	e4:SetOperation(s.spop)
	c:RegisterEffect(e4)
end
s.listed_series={SET_MAGIKEY}
function s.matlimit(e,c)
	if not c then return false end
	return not c:IsSetCard(SET_MAGIKEY)
end
function s.sumcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsPlayerCanAdditionalSummon(tp)
		and Duel.IsExistingMatchingCard(aux.FaceupFilter(Card.IsSetCard,SET_MAGIKEY),tp,LOCATION_MZONE,0,1,nil)
end
function s.sumcost(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return Duel.GetFlagEffect(tp,id)==0 and not c:IsPublic() end
	Duel.ConfirmCards(1-tp,c)
end
function s.sumtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsPlayerCanSummon(tp) end
end
function s.sumop(e,tp,eg,ep,ev,re,r,rp)
	--Extra Normal Summon
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetDescription(aux.Stringid(id,2))
	e1:SetCode(EFFECT_EXTRA_SUMMON_COUNT)
	e1:SetTargetRange(LOCATION_HAND|LOCATION_MZONE,0)
	e1:SetTarget(aux.TargetBoolFunction(Card.IsSetCard,SET_MAGIKEY))
	e1:SetReset(RESET_PHASE|PHASE_END)
	Duel.RegisterEffect(e1,tp)
	Duel.RegisterFlagEffect(tp,id,RESET_PHASE|PHASE_END,0,1)
end
function s.spfilter(c,e,tp)
	return c:IsLevelBelow(4) and (c:IsType(TYPE_NORMAL) or c:IsSetCard(SET_MAGIKEY)) 
		and c:IsCanBeSpecialSummoned(e,0,tp,false,false,POS_FACEUP_DEFENSE)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(tp) and s.spfilter(chkc,e,tp) end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0
		and Duel.IsExistingTarget(s.spfilter,tp,LOCATION_GRAVE,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,LOCATION_GRAVE,0,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,0,0)
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then 
		Duel.SpecialSummon(tc,0,tp,tp,false,false,POS_FACEUP_DEFENSE)
	end
end