Celestial Zenith Stone

You occasionally find yourself looking towards the
heavens - feeling unheard voices whispering to you.
In the 5 minutes windows around midday and midnight, you can use an action to speak this
stone's command word (Zon / Lhune) and regain
one expended spell slot of up to 3rd level. Holder instinctively knows when this power is available
to use.
Cannot be used for 3 consecutive windows.
Does NOT require attunement.