Bob

Magic Item (skull), very rare, (requires attunement)

Bob is a spirit of knowledge who inhabits a skull. The skull appears as a normal sized human skull covered in several arcane runes, and when Bob is asleep the skull has no special appearence, but when he is awake the eyes of the skull begin glowing with a magical light.

Bob sleeps at least six hours every single day out of necessity, but will often sleep much more if he is not in use.

Bob becomes immediatly attuned to the first spellcaster that holds him, if he has no current owner. He can not be given after this, and will only cease to be owned if he remains at least a hundred miles apart from the spellcaster he is attoned to for one hundred years, or if his current owner dies.

When Bob first becomes attuned to an individual, he takes on the personallity of the spellcaster. This personallity becomes an almost exagerration, and does not change. No matter how much the spellcaster might wish it would. A cleric who gains it might find Bob to be a enthusiastic worshiper of their god, a teenager might find Bob to be a dirty minded horn dog, or a eldritch knight might find him to be a well thought general with a mind for combat.

Bob has the following abilities:

Bob has no physical ability scores differences, but he holds a 30 in intelligence, 20 in wisdom, and a 10 in charisma.

Bob can see through the eyes of his skull, and hear out of it like a normal creature would. Additionally, he can speak as any other creature could.

Bob has a +12 on all Intelligence based rolls.

Bob can speak, read, and theoretically write all languages as if he had the proper muscles and body parts for doing so.

Bob may leave his skull as an action. If he does so he has the stats of an invisible stalker, but he keeps his languages, can speak, does not have any sort of attack action, and has an intelligence of 22.

If Bob has not returned to his skull by sunrise he suffers 4d8 fire damage every round, in his Invisible stalker form, until he either dies or returns to his skull.

As an action Bob may possess a willing creature and control its actions as if he were the creature. He suffers no inconviences from being in sunlight like this. As a bonus action Bob may unpossess it, and either go into his skull if it is within 10 feet, or he may leave the body and go into his Invisible Stalker form.

Bob remembers and can accurately recall every peice of information he has ever seen or heard.

Bob is immune to being charmed, frightened, grappled, exhausted, or any other mental or physical condition.

While Bob is not bound to obey orders given to him, he is always happy to be given something to do, and will generally help. Though sometimes he may attempt to negotiate with his owner to get something in return for his work. Whether that's a type of book, a drawing of something he likes, or just being allowed to go out on the town for a night. He will keeps his prices fair enough, and easy to get.

Credit: Dresden Files