Sword Kits are mainly used to change the skin or appearance of Jin's saya or scabbard of the Sakai Katana. Ghost of Tsushima is filled with collectibles to find, and Pillars of Honor are one of them. This item does not grant any buffs or add any perks but instead, it is mainly used for customization purposes only. As usual, there's an interesting reward for obtaining Mamushi Venom is a Sword Kit in Ghost of Tsushima (GoT).