Question: destiny 2 how to unlock mysterious box?
Answer: Speak with Ada-1. Visit Ada-1 to receive the Black Armory Key Mold, the final key needed to unlock the Mysterious Box. ...  Go to the Leviathan. ...  Complete the Bergusia forge. ...  Return to Ada-1. ...  Complete a Rare Black Armory bounty. ...  Complete the Shattered Throne. ...  Complete the Pyramidion Strike.