Wearing these 2 platinum bracelets, you have a bonus of +2 to your CA. In addition, these bracelets have a total of 4 charges and recover 1d4 charges every day at dawn.

You can use an action to expend 1 or more charges to cast the Chain Lightning spell through them, requiring no components.
For 1 charge, you cast the 6th-level version of the spell. You can increase your spell slot by one for each additional charge spent.

Curse : The bracelets are cursed, which is only revealed when you connect. Attuning to the bracelets curses you until you become the target of the Remove Curse spell. You cannot take off your bracelets until Remove Curse is cast.
While you are cursed the spirit of Tineuhtl haunts you, every time you pause the spirit appears to you in a dream, you must make a DC 15 Wisdom saving throw. If you don't, you take 10d8 psychic damage and are unable to fall asleep.
Additionally, you must make a DC 10 Constitution saving throw or suffer one level of enfeeblement. After the first 24 hours, the DC increases by 5 for each consecutive 24-hour period spent without long rest. The DC returns to 10 when the character completes a long rest.