Dawn

[ Aube ]
level 5 - evocation
Casting Time: 1 action
Range: 60 feet
Components: V, S, M (a sunburst pendant worth at least 100 gp)
Duration: Concentration, up to 1 minute

Description not available (not OGL).
But here is a summary:

Creatures in a 30-ft-radius, 40-ft-high cylinder must succeed on a Con. save or take 4d10 radiant damage.
Cleric
Wizard
Xanathar´s Guide to Everything
  1. DnD 5e Spells › Dawn