A cool light wreathes your body for the duration, emitting in a 20-foot radius and for an additional 20 feet.
Until the spell ends, you have to Radiant damage, and your melee attacks deal an extra 2d6 Radiant damage on a hit.
In addition, immediately after you take damage from a creature you can see within 60 feet of yourself, you can take a to force the creature to make a Constitution saving throw. On a failed save, the creature has the condition until the end of your next turn.