Ink Bladder

Wondrous item (technomagical), uncommon

This preserved animal bladder mimics the escape mechanism employed by marine creatures. Once per day, if you are submerged you can squeeze the bladder to create a pressurized blast of dark ink. A 5-foot-radius cloud of ink extends all around you if you are underwater. The area is heavily obscured for 1 minute, although a significant current can disperse the ink. After releasing the ink, you can use the Dash action as a bonus action.