Twilight burst

a burst of twilight energy descends on a creature you can see within range. the target makes a con save and upon a failure takes 1d4 radiant damage and 1d4 necrotic damage (both for a total of 2d4 with 2 damage types). The damage is halved on a successful saving throw (minimum of 1 damage). if the target is in dim light or darkness it instead takes 1d6 radiant damage and 1d6 necrotic damage