Premature
Banish 1 card from your hand, then target 1 of your banished monsters; Special Summon it in face-down Defense Position.
local s, id, o = GetID()
function s.initial_effect(c)
	--Activate
	local e1 = Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.cost(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return Duel.IsExistingMatchingCard(Card.IsAbleToRemoveAsCost, tp, LOCATION_HAND, 0, 1, e:GetHandler())
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_REMOVE)
	local g = Duel.SelectMatchingCard(tp, Card.IsAbleToRemoveAsCost, tp, LOCATION_HAND, 0, 1, 1, e:GetHandler())
	Duel.Remove(g, POS_FACEUP, REASON_COST)
end
function s.filter(c, e, tp)
	return c:IsFaceup() and c:IsCanBeSpecialSummoned(e, 0, tp, false, false, POS_FACEDOWN_DEFENSE)
end
function s.target(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
	if chkc then
		return chkc:IsLocation(LOCATION_REMOVED) and chkc:IsControler(tp) and s.filter(chkc, e, tp)
	end
	if chk == 0 then
		return Duel.GetLocationCount(tp, LOCATION_MZONE) > 0 and Duel.IsExistingTarget(s.filter, tp, LOCATION_REMOVED, 0, 1, nil, e, tp)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_SPSUMMON)
	local g = Duel.SelectTarget(tp, s.filter, tp, LOCATION_REMOVED, 0, 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.SpecialSummon(tc, 0, tp, tp, false, false, POS_FACEDOWN_DEFENSE) > 0 then
		Duel.ConfirmCards(1 - tp, tc)
	end
end


Premature
Banish 1 card from your hand, then target 1 of your banished monsters; Special Summon it in face-down Defense Position.
-- Premature
local s, id, o = GetID()
function s.initial_effect(c)
	--Activate
	local e1 = Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCost(s.cost)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.cost(e, tp, eg, ep, ev, re, r, rp, chk)
	if chk == 0 then
		return Duel.IsExistingMatchingCard(Card.IsAbleToRemoveAsCost, tp, LOCATION_HAND, 0, 1, e:GetHandler())
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_REMOVE)
	local g = Duel.SelectMatchingCard(tp, Card.IsAbleToRemoveAsCost, tp, LOCATION_HAND, 0, 1, 1, e:GetHandler())
	Duel.Remove(g, POS_FACEUP, REASON_COST)
end
function s.filter(c, e, tp)
	return c:IsFaceup() and c:IsCanBeSpecialSummoned(e, 0, tp, false, false, POS_FACEDOWN_DEFENSE)
end
function s.target(e, tp, eg, ep, ev, re, r, rp, chk, chkc)
	if chkc then
		return chkc:IsLocation(LOCATION_REMOVED) and chkc:IsControler(tp) and s.filter(chkc, e, tp)
	end
	if chk == 0 then
		return Duel.GetLocationCount(tp, LOCATION_MZONE) > 0 and Duel.IsExistingTarget(s.filter, tp, LOCATION_REMOVED, 0, 1, nil, e, tp)
	end
	Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_SPSUMMON)
	local g = Duel.SelectTarget(tp, s.filter, tp, LOCATION_REMOVED, 0, 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.SpecialSummon(tc, 0, tp, tp, false, false, POS_FACEDOWN_DEFENSE) > 0 then
		Duel.ConfirmCards(1 - tp, tc)
	end
end

