Shadowcloak of Nocturnal

Shadowcloak of Nightingale is a skill awarded to the player by Nocturnal in the final Thieves Guild quest Darkness Returns. It can be exchanged once a day for the skills Nightingale Subtefuge or Nightingale Strife. It is listed under Powers.

Skill Description
For 120 seconds you automatically become invisible while sneaking.

Location
Twilight Sepulcher

Quest
Darkness Returns