This will most likely be Ruins pickaxe called Demon Skull. : r/FortNiteBR
Graveheart's pickaxe has the same problem as Dread Omen's pickaxe, another pickaxe that can ruin your gameplay. I can't imagine the amount of pickaxes with this same bug (the original bug report
Can we have the option to use the default sound for any pickaxe? Some swinging sounds ruin otherwise great pickaxes : r/FortNiteBR
The New RUIN REWARDS! (New Fortnite Ruin Pickaxe) - YouTube
Buy Fortnite - Batarang Axe Pickaxe Epic Games PC Key - HRKGame.com