Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
1 "Gaia The Fierce Knight" monster + 1 Dragon-Type monster This card's name becomes "Gaia the Dragon Champion" while it is on the field. If this card is Special Summoned: You can add 1 "Spiral Spear Strike" from your Deck or Graveyard to your hand. When this card declares an attack on an opponent's monster: You can change the battle position of that opponent's monster.
--天翔の竜騎士ガイア
--Sky Galloping Gaia the Dragon Champion
local s,id=GetID()
function s.initial_effect(c)
	--fusion material
	c:EnableReviveLimit()
	Fusion.AddProcMix(c,true,true,aux.FilterBoolFunctionEx(Card.IsSetCard,SET_GAIA_THE_FIERCE_KNIGHT),aux.FilterBoolFunctionEx(Card.IsRace,RACE_DRAGON))
	--change name
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_SINGLE)
	e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
	e1:SetCode(EFFECT_CHANGE_CODE)
	e1:SetRange(LOCATION_MZONE)
	e1:SetValue(CARD_GAIA_CHAMPION)
	c:RegisterEffect(e1)
	--search
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetProperty(EFFECT_FLAG_DELAY)
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	e2:SetTarget(s.thtg)
	e2:SetOperation(s.thop)
	c:RegisterEffect(e2)
	--position
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,1))
	e3:SetCategory(CATEGORY_POSITION)
	e3:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_ATTACK_ANNOUNCE)
	e3:SetTarget(s.postg)
	e3:SetOperation(s.posop)
	c:RegisterEffect(e3)
end
s.listed_series={SET_GAIA_THE_FIERCE_KNIGHT}
s.listed_names={49328340}
s.material_setcode=SET_GAIA_THE_FIERCE_KNIGHT
function s.thfilter(c)
	return c:IsCode(49328340) 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_GRAVE|LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_GRAVE|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,aux.NecroValleyFilter(s.thfilter),tp,LOCATION_GRAVE|LOCATION_DECK,0,1,1,nil)
	if #g>0 then
		Duel.SendtoHand(g,nil,REASON_EFFECT)
		Duel.ConfirmCards(1-tp,g)
	end
end
function s.postg(e,tp,eg,ep,ev,re,r,rp,chk)
	local d=Duel.GetAttackTarget()
	if chk==0 then return d and d:IsControler(1-tp) and d:IsCanChangePosition() end
	Duel.SetOperationInfo(0,CATEGORY_POSITION,d,1,0,0)
end
function s.posop(e,tp,eg,ep,ev,re,r,rp)
	local d=Duel.GetAttackTarget()
	if d and d:IsRelateToBattle() then
		Duel.ChangePosition(d,POS_FACEUP_DEFENSE,POS_FACEDOWN_DEFENSE,POS_FACEUP_ATTACK,POS_FACEUP_ATTACK)
	end
end