(This material is from "Starter Spells" from Unearthed Arcana. This content is not official but is available for playtesting)

Evocation cantrip

Casting Time: 1 action

Range: Self (5-foot radius)

Components: V, S

Duration: Instantaneous

You raise your hand, and burning radiance erupts from it. Each creature of your choice that you can see within 5 feet of you must succeed on a Constitution saving throw or take 1d6 radiant damage.

The spell’s damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).