Seen in the 13th Century, these knives were innovative and quite deadly. The were 2 set of blades with an additional set of crescent blades bisecting the first blade (creating 4 blades). When properly presented , they resembled the antler or “horns” of a deer. They were considered a close quarters combat weapon, designed to slash and stab (using a stylized technique for deployment). The Deer Horn Knife was also concealable inside clothing (making them effective for assassins). They weighed around 1-pound and with the curving of the blades, measured 12 to 15 inches long.