Cloak of Verna Mist (5e Equipment)
From D&D Wiki
Wondrous Item, rare (requires attunement)
This black cloak has silver streaks running its length that glow in the moonlight. This magical item has 4 charges.
As a bonus action, the player can use a charge to activate this item and shift into the Ethereal Plane when moving. Until the start of your next turn, your movement speed increases by 15 feet and your movement doesn't provoke opportunity attacks.
This magical cloak regains 1d4 charges at midnight.