Caltrops

Scatter in an adjacent square (Interact). The first creature entering makes a DC 14 Acrobatics check or takes 1d4 piercing + 1 persistent bleed and −5 ft Speed while bleeding. Spending an Interact action to pluck them free lowers the DC to stop the bleeding. Once they deal damage, enough are ruined that the square is safe and they can't be salvaged; if they never dealt damage, they can be picked up and reused.

Hands: 1.

CONSUMABLE — can be replenished with a Supply Check (DC 10 + half item level) once all carried uses are gone.