Dark Whispers

You reach out towards one creature you can see and speak a portent of doom, and fiendish voices whisper promises of suffering in your target's mind. The target must succeed on a Wisdom saving throw or it takes 1d6 psychic damage and becomes frightened of you until the end of its next turn. If the target succeeds on its saving throw, it takes half damage and suffers no further effects. Constructs and summoned Undead cannot be affected by this spell.

The spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).