--Nightmare Mirror
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetCode(EVENT_ATTACK_ANNOUNCE)
	e1:SetCondition(s.condition)
	e1:SetCost(s.cost)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
function s.condition(e,tp,eg,ep,ev,re,r,rp)
	return Duel.GetAttacker():IsControler(1-tp)
end
function s.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(Card.IsDiscardable,tp,LOCATION_HAND,0,1,nil) end
	Duel.DiscardHand(tp,Card.IsDiscardable,1,1,REASON_COST+REASON_DISCARD,nil)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	Duel.ChangeAttackTarget(nil)
	local e0=Effect.CreateEffect(e:GetHandler())
	e0:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_CONTINUOUS)
	e0:SetCode(EVENT_PRE_BATTLE_DAMAGE)
	e0:SetOperation(s.damop)
	e0:SetReset(RESET_PHASE+PHASE_DAMAGE)
	Duel.RegisterEffect(e0,tp)
	local e1=Effect.CreateEffect(e:GetHandler())
	e1:SetType(EFFECT_TYPE_FIELD)
	e1:SetCode(EFFECT_REFLECT_BATTLE_DAMAGE)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetTargetRange(1,0)
	e1:SetReset(RESET_PHASE+PHASE_DAMAGE)
	Duel.RegisterEffect(e1,tp)
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	Duel.ChangeBattleDamage(1-tp,1000)
end