@TwoEpicBuddies have also datamined the new Blackblings, Gliders and Pickaxes coming to Fortnite Battle Royale, found in the V4.5 update:
Where to Dislodge or Destroy Runaway Boulders With a Melee Weapon – All Fortnite Locations
Players need to 'dislodge or destroy runaway boulders with a melee weapon' for one of the Fortnite chapter 3...