Shooting Stars

As an action, you can expend 1 to 3 Star Charges
and swing Chance. For every charge you expend,
you launch a glowing mote of light from the
sword at a point you can see within 60 feet.
Each creature within a 15-foot cube originating
from that point is showered in sparks and must
make a DC 15 Dexterity saving throw, taking
5d4 fire damage on a failed save, or half as
much damage on a successful one.