Circlet of Focused Fury

While the wearer is raging streams of fire jet
out of the stones imbued in this circlet. While
enraged, if you are attuned to this circlet and
are subjected to a saving throw, you may end
your rage early using your reaction to gain
advantage and a bonus on the saving throw
equal to your proficiency modifier. Once you
use this item, it cannot be used again until you
finish a long rest.