Small steel balls used in the moving parts of machinery and vehicle wheels. Scattered on a level floor, they roll beneath the feet and can bring a pursuer down. Unlike caltrops, they obstruct movement without relying on sharp points.
Ball Bearings
Properties
Unorganized
Material
Steel
Effect
As an action, you can spill 100 of these tiny metal balls from their pouch to cover a level, square area that is 10 feet on a side. A creature moving across the covered area must succeed on a DC 10 Dexterity saving throw or fall prone. A creature moving through the area at half speed doesn't need to make the save.