Watchful Helm (Attunement)

Very Rare

While you wear this helm, you gain a +1 bonus to AC and remain aware of your surroundings even while you're asleep, and you have advantage on Wisdom (Perception) checks that rely on sight. As a bonus action, you can cast the see invisibility spell from the helm. Once this property of the helm is used, it can't be used again until the next dawn.

Helm of Brilliance (Attunement)

Very Rare

Source: DDAL DRW-03 Saving Silverbeard This dazzling helm is set with 4 diamonds, 10 rubies, 16 fire opals, and 21 opals.