Touch of Fatigue

You channel negative energy through your touch, fatiguing the target. Make a melee spell attack. On a hit, the target takes d4 necrotic damage and must make a constitution saving throw. On a failed save, it gains one level of exhaustion, which disappears when the duration ends.
This spell's damage increases by 1d4 when you reach 5th Level (2d4), 11th level (3d4), and 17th level (4d4).