--Composing the Vertex Melody
local s,id,off=GetID()
function s.initial_effect(c)
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id+EFFECT_COUNT_CODE_OATH)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCategory(CATEGORY_TODECK+CATEGORY_SPECIAL_SUMMON)
	e1:SetTarget(s.tg)
	e1:SetOperation(s.act)
	c:RegisterEffect(e1)
end
function s.cfilter(c,e,tp)
	return c:IsSetCard(0x5a3) and c:IsAbleToExtra() and Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_EXTRA,0,1,nil,e,tp,c)
end
function s.filter(c,e,tp,tc)
	return c:IsLevel(3) and c:IsSetCard(0x5a3) and c:IsType(TYPE_FUSION) and not c:IsCode(tc:GetOriginalCode()) and c:IsCanBeSpecialSummoned(e,SUMMON_TYPE_FUSION,tp,false,false)
end
function s.tg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_PZONE) and chkc:IsControler(tp) and s.cfilter(chkc,e,tp) end
	if chk==0 then return Duel.GetLocationCountFromEx(tp,tp,nil,TYPE_FUSION)>0
		and Duel.IsExistingTarget(s.cfilter,tp,LOCATION_PZONE,0,1,nil,e,tp) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_TODECK)
	Duel.SetOperationInfo(0,CATEGORY_TODECK,Duel.SelectTarget(tp,s.cfilter,tp,LOCATION_PZONE,0,1,1,nil,e,tp),1,0,0)
	Duel.SetOperationInfo(0,CATEGORY_SPECIAL_SUMMON,nil,1,tp,LOCATION_EXTRA)
end
function s.act(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if not tc:IsRelateToEffect(e) or Duel.SendtoDeck(tc,nil,1,REASON_EFFECT)==0 or not tc:IsLocation(LOCATION_EXTRA)
		or tc:IsFaceup() then return end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
	local sc=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_EXTRA,0,1,1,nil,e,tp,tc):GetFirst()
	if sc then Duel.SpecialSummon(sc,SUMMON_TYPE_FUSION,tp,tp,false,false,POS_FACEUP)
	sc:CompleteProcedure() end
end