Eye of the Beholder

The eye has 4 charges and as an action, you can spend a charge to fire a ray from the eye.
The eye regains 1d4 -2 charges every day at dawn.
Target living creature must succeed on a DC 16 Wisdom saving throw or fall asleep and remain unconscious for 1 minute . The target awakens if it takes damage or another creature takes an action to wake it.