Only one of the items is of the Legendary rarity, so they are clearly not Artifacts as defined by the Dungeon Master's Guide.
The Seeing Veil is pretty cool, but the truesight has no range, so I assume it should be either 30 feet, (I'd probably change the rarity to rare then), 60 feet (seems fair for a very rare), or infinite within plane (in which case it should be legendary)
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