At least you two are playing the better game together.

A silvery beam of pale light shines down in a 5-foot radius, 40-foot-high Cylinder centered on a point within range. Until the spell ends, dim light fills the Cylinder.

When a creature enters the spell's area for the first time on a turn or starts its turn there, it is engulfed in ghostly flames that cause searing pain, and it must make a Constitution saving throw. It takes 2d10 radiant damage on a failed save, or half as much damage on a successful one.

Baby shark