Steel caltrop

A steel caltrop (short name: caltrop) is a spiked metal device trap thrown on the ground to harm adventurers. One may throw down caltrops in a location with a specified venom and the next three people to enter that location shall be struck with said venom. Note: this does not function under the effect of a retardation vibration, as the slowed time allows people to place their feet more efficiently.

Pieces:

(1) The spikes for a steel caltrop, level 1

(1) The ball for a steel caltrop, level 1

(1) The binding for a steel caltrop, level 1

(1) The barbs for a steel caltrop, level 1