--闇の訪れ
function c80168720.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_CARD_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCost(c80168720.cost)
	e1:SetTarget(c80168720.target)
	e1:SetOperation(c80168720.activate)
	c:RegisterEffect(e1)
end
function c80168720.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,2,e:GetHandler()) end
	Duel.DiscardHand(tp,Card.IsDiscardable,2,2,REASON_COST+REASON_DISCARD)
end
function c80168720.filter(c)
	return c:IsFaceup() and c:IsCanTurnSet()
end
function c80168720.target(e,tp,eg,ep,ev,re,r,rp,chk,chkc)
	if chkc then return chkc:IsLocation(LOCATION_MZONE) and c80168720.filter(chkc) end
	if chk==0 then return Duel.IsExistingTarget(c80168720.filter,tp,LOCATION_MZONE,LOCATION_MZONE,1,nil) end
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_FACEUP)
	local g=Duel.SelectTarget(tp,c80168720.filter,tp,LOCATION_MZONE,LOCATION_MZONE,1,1,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,1,0,0)
end
function c80168720.activate(e,tp,eg,ep,ev,re,r,rp)
	local tc=Duel.GetFirstTarget()
	if tc:IsRelateToEffect(e) and tc:IsFaceup() then
		Duel.ChangePosition(tc,POS_FACEDOWN_DEFENSE)
	end
end
