Tales of the Valiant Players Guide (pg. 261)
2nd ring Arcane, Necromancy
You can blind or deafen a foe. Choose one creature that you can see within range to make a CON save. If it fails, the target is either blinded or deafened (your choice) for the duration. At the end of each of its turns, the target can make a CON save. On a success, it is no longer affected by the spell.