3rd Level Divine Evocation (named)
Casting Time: 1 action
Range: Self (12 sqr. (18m) radius)
Components: V, S
Duration: Instantaneous
You release a piercing howl imbued with divine energy, forcing all fiends within range to reveal themselves. Fiends in the radius must succeed on a Constitution saving throw or take 4d10 radiant damage and be stunned until the end of your next turn.
Even on a success, fiends cannot become invisible or hidden for 1 minute.