Small iron spikes arranged so that one point faces upwards however they fall. Scattered across a passage, they pierce the feet of creatures moving through and slow pursuit. They serve a similar purpose to ball bearings, but wound rather than merely trip.
Caltrops
Properties
Unorganized
Weapon Type
Other
Weapon Class
Simple
Material
Iron
Weight
1lb (20)
Effect
As an action, you can spread a bag of caltrops to cover a square area that is up to 5 feet on a side. Any creature that enters the area must succeed on a DC 15 Dexterity saving throw or stop moving this turn and take 1 piercing damage. Taking this damage reduces the creature's walking speed by 10 feet until the creature regains at least 1 hit point. A creature moving through the area at half speed doesn't need to make the save.