Magic sleeper darts

Quantity: 3 magic darts
Damage: 1d4 Piercing
Properties: Finesse, Thrown, Range: 20/60
On a hit, roll 8d10; If the target's hit points
is less than the roll, the creature is magically asleep for 1 minute.
If the sleeper takes damage, or someone uses
an action to shake sleeper, the sleeper will awake.