Staff of Nightmares

Holds 3 charges, expend 1 charge to cast
Sleep as a 1st lvl spell
recharges 1d4+1 charges at dusk
if a charge is restored in this way make a DC 12
wisdom save.
On a fail gain 1 level of exhaustion having a sleep
filled with horrific nightmares
if the staff would have 0 charges roll a d20 on
a 1 the staff crumbles to dust
and is destroyed