Source: Arcana Unleashed
Weapon (Dagger), Rare
You gain a +1 bonus to attack rolls and damage rolls made with this magic weapon.
Identify Target. When you hit a creature with an attack roll using this weapon, you can compel the target to reveal its identity. The target makes a DC 15 Wisdom saving throw. On a failed save, the target says or signs its name clearly and emphatically. On a successful save, the target is immune to this effect for the next 24 hours. If the creature can’t speak or sign a language, it automatically succeeds on the save.
Named Target. When you hit a creature with an attack roll using this weapon, you can say or sign the target’s name clearly and emphatically to turn the hit into a Critical Hit. Once this property is used, it can’t be used again until the next dawn.