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Umbral Collar Zealot This is by far the least flashy card on this list, but Umbral Collar Zealot proves its worth in all sorts of aristocrats decks

You could also go for larger Equipment that grant vigilance, such as Batterskull, Sword of Vengeance, and Mace of the Valiant

Im not including countermagic because those are two different topicsthough a couple of these blue cards are modal spells that both bounce permanents and counter a spell

Taking an extra combat phase lets plenty of aggressive decks turn the corner

however, value-wise, I would say that this Lairs biggest draw would be the foil Field of the Dead (Cabin of the Dead)