Absorbing Shield

While held you can use one charge to cast darkness centered on the shield and disintegrate can be cast using two charges.
The shield has 4 charges and regains 1d4 charges each day at dusk. If you ever expend the last charge roll a d20. On a 1 or 2 the shield shatters casting the darkness centered on you.
This effect lasts for 2d6+2 hours or until dispel magic, remove curse, antimagic field, or other magic is used to get rid of it.