Melffy
If your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack: You can return this card to the hand, then you can Special Summon 1 Beast monster from your hand, except "Melffy Fenny". During your End Phase: You can Special Summon this card from your hand. You can only use each effect of "Melffy Fenny" once per turn.
local s, id, o = GetID()
function s.initial_effect(c)
	--to hand
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetCategory(CATEGORY_TOHAND + CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetProperty(EFFECT_FLAG_DELAY)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1, id)
	e1:SetCondition(s.thcon)
	e1:SetTarget(s.thtg)
	e1:SetOperation(s.thop)
	c:RegisterEffect(e1)
	local e2 = e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e2)
	local e3 = e1:Clone()
	e3:SetType(EFFECT_TYPE_SINGLE + EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_BE_BATTLE_TARGET)
	e3:SetCondition(s.thcon2)
	c:RegisterEffect(e3)
	--spsummon
	local e4 = Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id, 1))
	e4:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e4:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_TRIGGER_O)
	e4:SetCode(EVENT_PHASE + PHASE_END)
	e4:SetRange(LOCATION_HAND)
	e4:SetCountLimit(1, id + 1)
	e4:SetCondition(s.spcon)
	e4:SetTarget(s.sptg)
	e4:SetOperation(s.spop)
	c:RegisterEffect(e4)
end
function s.cfilter(c, sp)
	return c:IsSummonPlayer(sp)
end
function s.thcon(e, tp, eg, ep, ev, re, r, rp)
	return eg:IsExists(s.cfilter, 1, nil, 1 - tp)
end
function s.thcon2(e, tp, eg, ep, ev, re, r, rp)
	return Duel.GetAttacker():IsControler(1 - tp)
end
function s.thtg(e, tp, eg, ep, ev, re, r, rp, chk)
	local c = e:GetHandler()
	if chk == 0 then
		return c:IsAbleToHand()
	end
	Duel.SetOperationInfo(0, CATEGORY_TOHAND, c, 1, 0, 0)
end
function s.thfilter(c, e, tp)
	return c:IsRace(RACE_BEAST) and not c:IsCode(id) and c:IsCanBeSpecialSummoned(e, 0, tp, false, false)
end
function s.thop(e, tp, eg, ep, ev, re, r, rp)
	local c = e:GetHandler()
	if
		c:IsRelateToEffect(e)
		and Duel.SendtoHand(c, nil, REASON_EFFECT) ~= 0
		and c:IsLocation(LOCATION_HAND)
		and Duel.GetLocationCount(tp, LOCATION_MZONE) > 0
		and Duel.IsExistingMatchingCard(s.thfilter, tp, LOCATION_HAND, 0, 1, nil, e, tp)
		and Duel.SelectYesNo(tp, aux.Stringid(id, 2))
	then
		Duel.BreakEffect()
		Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_SPSUMMON)
		local g = Duel.SelectMatchingCard(tp, s.thfilter, tp, LOCATION_HAND, 0, 1, 1, nil, e, tp)
		Duel.SpecialSummon(g, 0, tp, tp, false, false, POS_FACEUP)
	end
end
function s.spcon(e, tp, eg, ep, ev, re, r, rp)
	return Duel.GetTurnPlayer() == tp
end
function s.sptg(e, tp, eg, ep, ev, re, r, rp, chk)
	local c = e:GetHandler()
	if chk == 0 then
		return Duel.GetLocationCount(tp, LOCATION_MZONE) > 0 and c:IsCanBeSpecialSummoned(e, 0, tp, false, false)
	end
	Duel.SetOperationInfo(0, CATEGORY_SPECIAL_SUMMON, c, 1, 0, 0)
end
function s.spop(e, tp, eg, ep, ev, re, r, rp)
	local c = e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c, 0, tp, tp, false, false, POS_FACEUP)
	end
end


Melffy
If your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack: You can return this card to the hand, then you can Special Summon 1 Beast monster from your hand, except "Melffy Fenny". During your End Phase: You can Special Summon this card from your hand. You can only use each effect of "Melffy Fenny" once per turn.
-- Melffy
local s, id, o = GetID()
function s.initial_effect(c)
	--to hand
	local e1 = Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id, 0))
	e1:SetCategory(CATEGORY_TOHAND + CATEGORY_SPECIAL_SUMMON)
	e1:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_TRIGGER_O)
	e1:SetCode(EVENT_SUMMON_SUCCESS)
	e1:SetProperty(EFFECT_FLAG_DELAY)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1, id)
	e1:SetCondition(s.thcon)
	e1:SetTarget(s.thtg)
	e1:SetOperation(s.thop)
	c:RegisterEffect(e1)
	local e2 = e1:Clone()
	e2:SetCode(EVENT_SPSUMMON_SUCCESS)
	c:RegisterEffect(e2)
	local e3 = e1:Clone()
	e3:SetType(EFFECT_TYPE_SINGLE + EFFECT_TYPE_TRIGGER_O)
	e3:SetCode(EVENT_BE_BATTLE_TARGET)
	e3:SetCondition(s.thcon2)
	c:RegisterEffect(e3)
	--spsummon
	local e4 = Effect.CreateEffect(c)
	e4:SetDescription(aux.Stringid(id, 1))
	e4:SetCategory(CATEGORY_SPECIAL_SUMMON)
	e4:SetType(EFFECT_TYPE_FIELD + EFFECT_TYPE_TRIGGER_O)
	e4:SetCode(EVENT_PHASE + PHASE_END)
	e4:SetRange(LOCATION_HAND)
	e4:SetCountLimit(1, id + 1)
	e4:SetCondition(s.spcon)
	e4:SetTarget(s.sptg)
	e4:SetOperation(s.spop)
	c:RegisterEffect(e4)
end
function s.cfilter(c, sp)
	return c:IsSummonPlayer(sp)
end
function s.thcon(e, tp, eg, ep, ev, re, r, rp)
	return eg:IsExists(s.cfilter, 1, nil, 1 - tp)
end
function s.thcon2(e, tp, eg, ep, ev, re, r, rp)
	return Duel.GetAttacker():IsControler(1 - tp)
end
function s.thtg(e, tp, eg, ep, ev, re, r, rp, chk)
	local c = e:GetHandler()
	if chk == 0 then
		return c:IsAbleToHand()
	end
	Duel.SetOperationInfo(0, CATEGORY_TOHAND, c, 1, 0, 0)
end
function s.thfilter(c, e, tp)
	return c:IsRace(RACE_BEAST) and not c:IsCode(id) and c:IsCanBeSpecialSummoned(e, 0, tp, false, false)
end
function s.thop(e, tp, eg, ep, ev, re, r, rp)
	local c = e:GetHandler()
	if
		c:IsRelateToEffect(e)
		and Duel.SendtoHand(c, nil, REASON_EFFECT) ~= 0
		and c:IsLocation(LOCATION_HAND)
		and Duel.GetLocationCount(tp, LOCATION_MZONE) > 0
		and Duel.IsExistingMatchingCard(s.thfilter, tp, LOCATION_HAND, 0, 1, nil, e, tp)
		and Duel.SelectYesNo(tp, aux.Stringid(id, 2))
	then
		Duel.BreakEffect()
		Duel.Hint(HINT_SELECTMSG, tp, HINTMSG_SPSUMMON)
		local g = Duel.SelectMatchingCard(tp, s.thfilter, tp, LOCATION_HAND, 0, 1, 1, nil, e, tp)
		Duel.SpecialSummon(g, 0, tp, tp, false, false, POS_FACEUP)
	end
end
function s.spcon(e, tp, eg, ep, ev, re, r, rp)
	return Duel.GetTurnPlayer() == tp
end
function s.sptg(e, tp, eg, ep, ev, re, r, rp, chk)
	local c = e:GetHandler()
	if chk == 0 then
		return Duel.GetLocationCount(tp, LOCATION_MZONE) > 0 and c:IsCanBeSpecialSummoned(e, 0, tp, false, false)
	end
	Duel.SetOperationInfo(0, CATEGORY_SPECIAL_SUMMON, c, 1, 0, 0)
end
function s.spop(e, tp, eg, ep, ev, re, r, rp)
	local c = e:GetHandler()
	if c:IsRelateToEffect(e) then
		Duel.SpecialSummon(c, 0, tp, tp, false, false, POS_FACEUP)
	end
end

