Wondrous Item, artifact
Typically described as a “‘Slightly’ stained and buckled gold and silver crown/circlet that has clearly seen some action, but somehow survived,” this sentient crown has 6 charges. While wearing it, you can spend 1d4 minutes and expend 1 charge to cast the Augury spell or 3 charges to cast Commune. You may also ask more detailed questions without expending charges, and after 1d6 minutes, the crown will offer advice. but the advice has an equal chance of being most likely helpful or harmful. The crown regains 1d4 + 2 expended charges daily at dawn.
Need a cunning plan or some instant answers whilst your brain is still processing all the inputs, this is the item for you! Arthur Anzuu always has a new way of approaching a problem (“Of course that centaur will negotiate, not attack”) or an intricate set of actions to circumvent or negate the problem! (“Hey Arthur, what would you do?”)