The Shadow Cloak is a dark and ominous garment made of tattered black fabric. When worn, it shrouds the wearer in a cloak of shadows, making them difficult to see and track. The Cloak also seems to imbue the wearer with a sense of stealth and cunning, allowing them to move more quietly and make themselves less noticeable.

Abilities: The Shadow Cloak has a number of powerful abilities, but each use comes at a cost. These abilities are:

1. Shadow Step: The wearer can teleport up to 30 feet to a space within dim light or darkness, once per day. However, after using this ability, the wearer must make a Wisdom saving throw (DC 15) or become disoriented and lose their sense of direction for 1d4 rounds.

2. Shadow Veil: The wearer can become invisible for up to 1 minute, but after the effect ends, they must make a Constitution saving throw (DC 15) or suffer 1 level of exhaustion.

3. Shadow Strike: The wearer can imbue their weapon with shadowy energy, dealing an extra 2d6 necrotic damage on their next attack. However, after using this ability, the wearer must make a Wisdom saving throw (DC 15) or become frightened of their own shadow for 1d4 rounds.

The Shadow Cloak is a powerful and versatile magic item, but it comes with significant risks and drawbacks. The wearer must be careful not to overuse its abilities, lest they become overwhelmed by the shadows that surround them.

The Shadow Cloak would be a valuable artifact for any rogue or assassin, allowing them to move unseen and strike from the shadows. However, it could also be a dangerous and corrupting influence, tempting the wearer to embrace the darkness and turn against their allies.