--ヴェルズ・タナトス
function c65884091.initial_effect(c)
	--xyz summon
	aux.AddXyzProcedure(c,c65884091.xyzfilter,2)
	c:EnableReviveLimit()
	--immune
	local e1=Effect.CreateEffect(c)
	e1:SetDescription(aux.Stringid(65884091,0))
	e1:SetType(EFFECT_TYPE_QUICK_O)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1)
	e1:SetRange(LOCATION_MZONE)
	e1:SetCost(c65884091.cost)
	e1:SetOperation(c65884091.operation)
	c:RegisterEffect(e1)
end
function c65884091.xyzfilter(c)
	return c:GetLevel()==4 and c:IsAttribute(ATTRIBUTE_DARK)
end
function c65884091.cost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():CheckRemoveOverlayCard(tp,1,REASON_COST) end
	e:GetHandler():RemoveOverlayCard(tp,1,1,REASON_COST)
end
function c65884091.operation(e,tp,eg,ep,ev,re,r,rp)
	local c=e:GetHandler()
	if c:IsFaceup() and c:IsRelateToEffect(e) then
		local e1=Effect.CreateEffect(c)
		e1:SetType(EFFECT_TYPE_SINGLE)
		e1:SetProperty(EFFECT_FLAG_SINGLE_RANGE)
		e1:SetRange(LOCATION_MZONE)
		e1:SetCode(EFFECT_IMMUNE_EFFECT)
		e1:SetReset(RESET_EVENT+0x1fe0000+RESET_PHASE+RESET_END)
		e1:SetValue(c65884091.efilter)
		c:RegisterEffect(e1)
	end
end
function c65884091.efilter(e,te)
	return te:IsActiveType(TYPE_EFFECT)
end
