Armor of the Black River

Armor (heavy), rare (requires attunement)

While wearing this armor, you gain a +1 bonus to AC, and you are immune to shadow corruption and void taint while you wear this armor. Additionally, you can use an action to assume a ghostly form for 10 minutes (together with up to ten creatures you touch), or until you are no longer wearing the armor, gaining a flying speed of 200 feet. You cannot take actions other than movement while in this form. Once this special action is used, it can’t be used again until the next dawn.

When combined with the Styx boots, the armor of the Black River permits you to use any branch of the River Styx or other planar waterways as a shadow road. Once per week, you can walk on such a planar waterway for 8 hours and arrive at any other plane of your choosing.