Caltrap?

Card	Caltrap
Set	Heraldry
Edition	Beta
Book value	Est. 22 to 54 Credits once graded
Checklist	11 / 57
Rarity	Common
Owned	1

Caltrap

A caltrop is a four-spiked iron ball that lands with one spike always pointing up, scattered on the ground to cripple cavalry horses. On a shield it stands for defence and preparedness against an enemy charge.