--闇の護封剣
function c12923641.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_POSITION)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetTarget(c12923641.target)
	e1:SetOperation(c12923641.activate)
	c:RegisterEffect(e1)
	--cannot change position
	local e2=Effect.CreateEffect(c)
	e2:SetType(EFFECT_TYPE_FIELD)
	e2:SetRange(LOCATION_SZONE)
	e2:SetCode(EFFECT_CANNOT_CHANGE_POSITION)
	e2:SetProperty(EFFECT_FLAG_SET_AVAILABLE)
	e2:SetTargetRange(0,LOCATION_MZONE)
	c:RegisterEffect(e2)
end
function c12923641.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	local c=e:GetHandler()
	c:SetTurnCounter(0)
	local g=Duel.GetMatchingGroup(Card.IsCanTurnSet,tp,0,LOCATION_MZONE,nil)
	Duel.SetOperationInfo(0,CATEGORY_POSITION,g,g:GetCount(),0,0)
	--destroy
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e1:SetProperty(EFFECT_FLAG_CANNOT_DISABLE)
	e1:SetCode(EVENT_PHASE+PHASE_STANDBY)
	e1:SetCountLimit(1)
	e1:SetRange(LOCATION_SZONE)
	e1:SetCondition(c12923641.descon)
	e1:SetOperation(c12923641.desop)
	e1:SetReset(RESET_EVENT+RESETS_STANDARD+RESET_PHASE+PHASE_STANDBY+RESET_SELF_TURN,2)
	c:RegisterEffect(e1)
end
function c12923641.activate(e,tp,eg,ep,ev,re,r,rp)
	if not e:GetHandler():IsRelateToEffect(e) then return end
	local g=Duel.GetMatchingGroup(Card.IsCanTurnSet,tp,0,LOCATION_MZONE,nil)
	if g:GetCount()>0 then
		Duel.ChangePosition(g,POS_FACEDOWN_DEFENSE)
	end
end
function c12923641.descon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetTurnPlayer()==tp
end
function c12923641.desop(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	local ct=c:GetTurnCounter()
	ct=ct+1
	c:SetTurnCounter(ct)
	if ct==2 then
		Duel.Destroy(c,REASON_RULE)
	end
end