Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
You can discard this card, then activate 1 of these effects; ● Add 1 "Magistus" monster from your Deck to your hand, except "Spoon, the Seal of Magistus". ● Halve the ATK of 1 face-up monster your opponent controls until the end of this turn. You can banish this card from your GY, then target 1 face-up monster you control; equip it with 1 "Magistus" monster from your Extra Deck or GY. You can only use each effect of "Spoon, the Seal of Magistus" once per turn.
--封印の魔道士スプーン
--Spoon, the Seal of Magistus
--scripted by pyrQ
local s,id=GetID()
function s.initial_effect(c)
	--Activate 1 of these effects
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCost(Cost.SelfDiscard)
	e1:SetTarget(s.efftg)
	e1:SetOperation(s.effop)
	c:RegisterEffect(e1)
	--Equip 1 "Magistus" monster from your Extra Deck or GY to 1 face-up monster you control
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,1))
	e2:SetCategory(CATEGORY_EQUIP)
	e2:SetType(EFFECT_TYPE_IGNITION)
	e2:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e2:SetRange(LOCATION_GRAVE)
	e2:SetCountLimit(1,{id,1})
	e2:SetCost(Cost.SelfBanish)
	e2:SetTarget(s.eqtg)
	e2:SetOperation(s.eqop)
	c:RegisterEffect(e2)
end
s.listed_series={SET_MAGISTUS}
s.listed_names={id}
function s.thfilter(c)
	return c:IsSetCard(SET_MAGISTUS) and c:IsMonster() and not c:IsCode(id) and c:IsAbleToHand()
end
function s.efftg(e,tp,eg,ep,ev,re,r,rp,chk)
	local b1=Duel.IsExistingMatchingCard(s.thfilter,tp,LOCATION_DECK,0,1,nil)
	local b2=Duel.IsExistingMatchingCard(Card.IsFaceup,tp,0,LOCATION_MZONE,1,nil)
	if chk==0 then return b1 or b2 end
	local op=Duel.SelectEffect(tp,
		{b1,aux.Stringid(id,2)},
		{b2,aux.Stringid(id,3)})
	e:SetLabel(op)
	if op==1 then
		e:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
		Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
	elseif op==2 then
		e:SetCategory(CATEGORY_ATKCHANGE)
	end
end
function s.effop(e,tp,eg,ep,ev,re,r,rp)
	local op=e:GetLabel()
	if op==1 then
		--Add 1 "Magistus" monster from your Deck to your hand, except "Spoon, the Seal of Magistus"
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
		local g=Duel.SelectMatchingCard(tp,s.thfilter,tp,LOCATION_DECK,0,1,1,nil)
		if #g>0 then
			Duel.SendtoHand(g,nil,REASON_EFFECT)
			Duel.ConfirmCards(1-tp,g)
		end
	elseif op==2 then
		--Halve the ATK of 1 face-up monster your opponent controls until the end of this turn
		Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATKDEF)
		local sc=Duel.SelectMatchingCard(tp,Card.IsFaceup,tp,0,LOCATION_MZONE,1,1,nil):GetFirst()
		if sc then
			Duel.HintSelection(sc)
			--Halve its ATK until the end of this turn
			local e1=Effect.CreateEffect(e:GetHandler())
			e1:SetType(EFFECT_TYPE_SINGLE)
			e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
			e1:SetCode(EFFECT_SET_ATTACK_FINAL)
			e1:SetValue(sc:GetAttack()/2)
			e1:SetReset(RESETS_STANDARD_PHASE_END)
			sc:RegisterEffect(e1)
		end
	end
end
function s.eqfilter(c,tp)
	return c:IsSetCard(SET_MAGISTUS) and c:IsMonster() and c:CheckUniqueOnField(tp) and not c:IsForbidden()
end
function s.eqtg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_MZONE) and chkc:IsFaceup() end
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_SZONE)>0
		and Duel.IsExistingTarget(Card.IsFaceup,tp,LOCATION_MZONE,0,1,nil)
		and Duel.IsExistingMatchingCard(s.eqfilter,tp,LOCATION_EXTRA|LOCATION_GRAVE,0,1,e:GetHandler(),tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	Duel.SelectTarget(tp,Card.IsFaceup,tp,LOCATION_MZONE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_EQUIP,nil,1,tp,LOCATION_EXTRA|LOCATION_GRAVE)
end
function s.eqop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if not (tc:IsRelateToEffect(e) and tc:IsFaceup() and Duel.GetLocationCount(tp,LOCATION_SZONE)>0) then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_EQUIP)
	local ec=Duel.SelectMatchingCard(tp,aux.NecroValleyFilter(s.eqfilter),tp,LOCATION_EXTRA|LOCATION_GRAVE,0,1,1,nil,tp):GetFirst()
	if ec and Duel.Equip(tp,ec,tc) then
		--Equip limit
		local e1=Effect.CreateEffect(e:GetHandler())
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
		e1:SetCode(EFFECT_EQUIP_LIMIT)
		e1:SetValue(function(e,c) return c==tc end)
		e1:SetReset(RESET_EVENT|RESETS_STANDARD)
		ec:RegisterEffect(e1)
	end
end