Let’s go with the Veil of Shadows cloak. Here’s a possible implementation:
Name: Veil of Shadows Type: Wondrous item (requires attunement)
Appearance: A dark gray cloak with intricate shadowy patterns
Description: While worn, the Veil of Shadows grants the wearer advantage on Stealth checks and allows them to hide in dim light or darkness, even when being observed. Once per turn, the wearer can activate the cloak’s magic to become invisible for 1 minute.
