Ball Bearings (bag of 1,000)

Adventuring gear

• Cost: 1 gp
• Weight: 2.0 lbs.

As an action, you can spill these tiny metal balls from their pouch to cover a level area 10 feet square. 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 saving throw.

Source: Player’s Handbook p. 151. Available in the SRD and the Basic Rules (2014)