Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Tribute 1 "Ninja" monster, then target 1 monster in your opponent's GY; Special Summon it to your field. It is also treated as a "Ninja" monster while this card is face-up on the field. When this card leaves the field, send that monster to the GY. You can only activate 1 "Ninjitsu Art of Mirage-Transformation" per turn.
--忍法 妖変化の術
--Ninjitsu Art of Mirage-Transformation
--Scripted by Eerie Code
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetHintTiming(0,TIMINGS_CHECK_MONSTER)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
	--Send the Summoned monster to the GY
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_CONTINUOUS+EFFECT_TYPE_SINGLE)
	e2:SetCode(EVENT_LEAVE_FIELD)
	e2:SetOperation(s.tgop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_NINJA}
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckReleaseGroupCost(tp,Card.IsSetCard,1,false,aux.ReleaseCheckMMZ,nil,SET_NINJA) end
	local g=Duel.SelectReleaseGroupCost(tp,Card.IsSetCard,1,1,false,aux.ReleaseCheckMMZ,nil,SET_NINJA)
	Duel.Release(g,REASON_COST)
end
function s.spfilter(c,e,tp)
	return c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_GRAVE) and chkc:IsControler(1-tp) and s.spfilter(chkc,e,tp) end
	if chk==0 then return Duel.IsExistingTarget(s.spfilter,tp,0,LOCATION_GRAVE,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local g=Duel.SelectTarget(tp,s.spfilter,tp,0,LOCATION_GRAVE,1,1,nil,e,tp)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,g,1,0,0)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and Duel.SpecialSummonStep(tc,0,tp,tp,false,false,POS_FACEUP) then
		local c=e:GetHandler()
		c:SetCardTarget(tc)
		--Treated as a "Ninja" monster
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetCode(EFFECT_ADD_SETCODE)
		e1:SetValue(SET_NINJA)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		tc:RegisterEffect(e1)
	end
	Duel.SpecialSummonComplete()
end
function s.tgop(e,tp,eg,ep,ev,re,r,rp)
	local tc=e:GetHandler():GetFirstCardTarget()
	if tc and tc:IsLocation(LOCATION_MZONE) then
		Duel.SendtoGrave(tc,REASON_EFFECT)
	end
end