Crucible Blade is a Gaming Legends Fortnite Harvesting Tool. Crucible Blade was available via the Battle Pass during Season 23 and could be unlocked on Page 6 and costs 7 Battle Stars.
How-to Get the Crucible Blade Harvesting Tool
Crucible Blade is part of Season 23. If that season is still currently in the game, you can obtain this item by purchasing and/or leveling up your Battle Pass.