Stone of Fire

When attuned, this Ioun Stone can be used
to cast Hellish Rebuke on an enemy as a
reaction. The creature that damaged you
must make a Dex Save of 14. It takes 2d10
fire damage on a failed save, or half as much
damage on a successful one.
This stone can be used once per Long Rest.
{1}{2}{3}{4}{5}