This headband appears to be a headband of intellect to anyone who tries to identify it, though it actually possesses none of that item's features.

Curse. This headband is cursed, a fact that reveals itself only when it is attuned to. It magically clouds your brain and can make you forget even the most natural things. After every long rest, you must roll a d6 for each class feature or feat you have that does not give the ability to cast spells and is not relied on by another class feature or feat. In addition, you must roll a d6 for every spell you have the ability to cast, done after you choose your spells if the feature the spell is from lets you change them on a long rest. You cannot use any class features, feats, or spells that you rolled a 1 on the d6 for until you finish a long rest. You are unwilling to part with the headband until the curse is broken with remove curse or similar magic.

Notes: Debuff, Cursed, Headwear