Ancient Roman Crow’s Foot Weapon
Puzzle 13 of At the Ballet Hard Pack
Question is: Ancient Roman Crow’s Foot Weapon
and the answer is: CALTROP
Word Meaning:
CALTROP — (weaponry) A metal object, usually small, with spikes arranged so that, when thrown onto the ground, one always faces up as a threat to pedestrians, horses, and vehicles (also used as a heraldic charge).
Definitions from Wiktionary.