Agonizing Mark

1st-level evocation

Casting Time: 1 action
Range: 90 feet
Components: S
Duration: Concentration, up to 1 minute

You choose a creature you can see within range to mark as your prey, and a ray of black energy issues forth from you. Until the spell ends, each time you deal damage to the target it must make a Charisma saving throw. On a failed save, it falls prone as its body is filled with torturous agony.