-- Goddess Erda's Guidance
-- Scripted by UnknownGuest
local s,id=GetID()
function s.initial_effect(c)
	-- activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCost(s.setcost)
	e1:SetTarget(s.settg)
	e1:SetOperation(s.setop)
	c:RegisterEffect(e1)
end
function s.cfilter(c)
	return c:IsSpell() and c:IsDiscardable()
end
function s.setcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.cfilter,tp,LOCATION_HAND,0,1,e:GetHandler()) end
	Duel.DiscardHand(tp,s.cfilter,1,1,REASON_COST+REASON_DISCARD,e:GetHandler())
end
function s.filter(c)
	return c:IsTrap() and c:IsSSetable(true)
end
function s.settg(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	local ft=Duel.GetLocationCount(tp,LOCATION_SZONE)
	if not e:GetHandler():IsLocation(LOCATION_SZONE) then
		ft=ft-1
	end
	if chkc then return chkc:IsControler(tp) and chkc:IsLocation(LOCATION_GRAVE) and s.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(s.filter,tp,LOCATION_GRAVE,0,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_SET)
	local g=Duel.SelectTarget(tp,s.filter,tp,LOCATION_GRAVE,0,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_LEAVE_GRAVE,g,1,0,0)
end
function s.setop(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc and tc:IsRelateToEffect(e) then
		Duel.SSet(tp,tc)
	end
end