The Shockwave Hammer has been temporarily removed from Fortnite after devs discovered it was responsible for several in-game glitches and a game-breaking bug.
The Fortnite hammer has quickly become controversial with many hating the fact it can deal so much damage if you are in close proximity to an attack. Predictably, a number of players have been quick to take advantage of the bug. This, in turn, has forced Epic's hand, with the dev vaulting the weapon – at least for the time being.
It was discovered a few days ago that you can break the Shockwave Hammer by executing a slam attack in mid-air, and maintain the Shockwave effect even while not using the hammer. Epic quickly decided it had to act to stop the swarms of teams leaping around the map causing huge amounts of damage to anybody in the vicinity and so, for now at least, the Shockwave Hammer is no more.