--NREM Nemesis
local cid,id=GetID()
function cid.initial_effect(c)
	c:EnableReviveLimit()
	--negate
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(id,0))
	e1:SetCategory(CATEGORY_TODECK+CATEGORY_REMOVE)
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DAMAGE_CAL)
	e1:SetCode(EVENT_CHAINING)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCountLimit(1)
	e1:SetCondition(cid.negcon)
	e1:SetCost(cid.negcost)
	e1:SetTarget(cid.negtg)
	e1:SetOperation(cid.negop)
	c:RegisterEffect(e1)
	--Protect Nightmare
	local e9=Effect.CreateEffect(c)
	e9:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e9:SetProperty(EFFECT_FLAG_DAMAGE_STEP+EFFECT_FLAG_DELAY)
	e9:SetCode(EVENT_RELEASE)
	e9:SetCondition(cid.indcon)
	e9:SetOperation(cid.atop)
	c:RegisterEffect(e9)
end
function cid.negcon(e,tp,eg,ep,ev,re,r,rp)
	return not e:GetHandler():IsStatus(STATUS_BATTLE_DESTROYED)
		and (re:IsActiveType(TYPE_MONSTER) or re:IsHasType(EFFECT_TYPE_ACTIVATE)) and Duel.IsChainNegatable(ev)
end
function cid.cfilter(c,rtype)
	return c:IsType(rtype) and c:IsAbleToGraveAsCost()
end
function cid.negcost(e,tp,eg,ep,ev,re,r,rp,chk)
	local rtype=bit.band(re:GetActiveType(),0x7)
	if chk==0 then return Duel.IsExistingMatchingCard(cid.cfilter,tp,LOCATION_HAND,0,1,nil,rtype) end
	Duel.DiscardHand(tp,cid.cfilter,1,1,REASON_COST,nil,rtype)
end
function cid.negtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return aux.nbcon(tp,re) end
	Duel.SetOperationInfo(0,CATEGORY_NEGATE,eg,1,0,0)
	if re:GetHandler():IsRelateToEffect(re) then
		Duel.SetOperationInfo(0,CATEGORY_TODECK,eg,1,0,0)
	end
end
function cid.negop(e,tp,eg,ep,ev,re,r,rp)
	if Duel.NegateActivation(ev) and re:GetHandler():IsRelateToEffect(re) then
		Duel.SendtoDeck(eg,nil,2,REASON_EFFECT)
	end
end
function cid.indcon(e,tp,eg,ep,ev,re,r,rp)
	return Duel.IsExistingTarget(cid.filter2,tp,LOCATION_MZONE,0,1,nil,tp)
end
function cid.filter2(c)
	return c:IsFaceup() and c:IsType(TYPE_RITUAL)
end
function cid.atop(e,tp,eg,ep,ev,re,r,rp)
	local g=Duel.GetMatchingGroup(cid.filter2,tp,LOCATION_MZONE,0,nil)
	local tc=g:GetFirst()
	local c=e:GetHandler()
	while tc do
		--indes
		local e2=Effect.CreateEffect(c)
		e2:SetType(EFFECT_TYPE_SINGLE)
		e2:SetCode(EFFECT_INDESTRUCTABLE_BATTLE)
		e2:SetRange(LOCATION_MZONE)
		e2:SetReset(RESET_EVENT+RESETS_STANDARD)
		e2:SetValue(1)
		tc:RegisterEffect(e2)
		tc=g:GetNext()
	end
end