--created & coded by Lyris, art at https://i.pinimg.com/originals/9e/96/c4/9e96c4cf5a360581e0d8ef7b1e738844.jpg
--スターダスト・アストロノマー
local s,id,o=GetID()
function s.initial_effect(c)
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_IGNITION)
	e1:SetRange(LOCATION_HAND)
	e1:SetCountLimit(1,id)
	e1:SetCategory(CATEGORY_SEARCH+CATEGORY_TOHAND)
	e1:SetCost(s.cost)
	e1:SetTarget(s.tg)
	e1:SetOperation(s.op)
	c:RegisterEffect(e1)
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_SINGLE)
	e2:SetCode(EFFECT_NONTUNER)
	e2:SetValue(s.tnval)
	c:RegisterEffect(e2)
	local e3=Effect.CreateEffect(c)
	e3:SetType(EFFECT_TYPE_IGNITION)
	e3:SetRange(LOCATION_GRAVE)
	e3:SetCountLimit(1,id+1000)
	e3:SetCategory(CATEGORY_SPECIAL_SUMMON+CATEGORY_DECKDES)
	e3:SetCost(aux.bfgcost)
	e3:SetTarget(s.sptg)
	e3:SetOperation(s.spop)
	c:RegisterEffect(e3)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	local c=e:GetHandler()
	if chk==0 then return c:IsDiscardable() end
	Duel.SendtoGrave(c,REASON_COST+REASON_DISCARD)
end
function s.filter(c)
	return c:IsSetCard(0xa2) and c:IsType(TYPE_MONSTER) and c:IsAbleToHand() and not c:IsCode(id)
end
function s.tg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_DECK,0,1,nil) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,1,tp,LOCATION_DECK)
end
function s.op(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,1,nil)
	Duel.SendtoHand(g,nil,REASON_EFFECT)
	Duel.ConfirmCards(1-tp,g)
end
function s.tnval(e,c)
	return e:GetHandler():IsControler(c:GetControler())
end
function s.sfilter(c,e,tp)
	return c:IsSetCard(0xa2) and c:IsCanBeSpecialSummoned(e,0,tp,false,false)
end
function s.sptg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.GetLocationCount(tp,LOCATION_MZONE)>0 and Duel.IsPlayerCanDiscardDeck(tp,3)
		and Duel.IsExistingMatchingCard(s.sfilter,tp,LOCATION_DECK,0,1,nil,e,tp) end
end
function s.spop(e,tp,eg,ep,ev,re,r,rp)
	Duel.ConfirmDecktop(tp,3)
	local g=Duel.GetDecktopGroup(tp,3)
	if #g>0 then
		Duel.DisableShuffleCheck()
		if g:IsExists(s.sfilter,1,nil,e,tp) and Duel.SelectEffectYesNo(tp,e:GetHandler()) then
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SPSUMMON)
			local sg=g:FilterSelect(tp,s.sfilter,1,1,nil,e,tp)
			if Duel.GetLocationCount(tp,LOCATION_MZONE)>0 then Duel.SpecialSummon(sg,0,tp,tp,false,false,POS_FACEUP)
			else Duel.SendtoGrave(sg,REASON_EFFECT) end
			g:Sub(sg)
			Duel.BreakEffect()
		end
		Duel.SendtoGrave(g,REASON_EFFECT+REASON_REVEAL)
	end
end