Each dagger is a magic weapon with a (+3) bonus to attack and damage rolls. Each deals 1d4 slashing damage plus 3. When you hit with either dagger, you may have its bonus damage deal radiant or necrotic damage instead of slashing. You choose the damage type for each hit.

While attuned to both daggers and holding one in each hand, you gain a (+2) bonus to AC. You can benefit from this bonus while wearing armor. The bonus ends while you are incapacitated or not holding both daggers.

As an action, expend 1 charge and choose one creature you can see within 60 feet. It makes a Charisma saving throw against your spell save DC, or DC 18 if you have none. On a failure, you learn whether it knowingly broke a promise or oath it made, or knowingly upheld one despite a substantial personal cost, within the past year. The effect reveals only whether either event occurred, not the details. A target that succeeds is immune to this property for 24 hours.

When you hit a creature with both daggers on the same turn, you may expend 2 charges to force it to make a DC 18 Constitution saving throw. On a failure, it takes 4d8 radiant or necrotic damage, your choice, and is restrained until the end of your next turn. On a success, it takes half as much damage and is not restrained. A creature can be affected by this property only once per turn.

When you would be reduced to 0 hit points but not killed outright, you may expend 4 charges to drop to 1 hit point instead. Each hostile creature of your choice within 10 feet takes 4d8 radiant or necrotic damage, your choice, and must succeed on a DC 18 Dexterity saving throw or be pushed up to 10 feet away. Once used, this property cannot be used again until the next dawn.