I anticipate that in the next session my players are going to encounter and interact with a Hag Eye. It is possible that they will ask whether or not they can, upon dispatching the coven it belongs to, attune to the eye to themselves.
Hag Eye. A hag coven can craft a magic item called a hag eye, which is made from a real eye coated in varnish and often fitted to a pendant or other wearable item. The hag eye is usually entrusted to a minion for safekeeping and transport. A hag in the coven can take an action to see what the hag eye sees if the hag eye is on the same plane of existence. A hag eye has AC 10, 1 hit point, and darkvision with a radius of 60 feet. If it is destroyed, each coven member takes 3d10 psychic damage and is blinded for 24 hours.
A hag coven can have only one hag eye at a time, and creating a new one requires all three members of the coven to perform a ritual. The ritual takes 1 hour, and the hags can't perform it while blinded. During the ritual, if the hags take any action other than performing the ritual, they must start over.
I was just wondering if there was any RAW answer to this? If not I expect that I will rule they cannot. The description makes no mention of other creatures using the eye, or attunement being involved - only its creation.
What about similar items such as the Night Hag's Heartstone or Soul Bag?