Ghost of Tsushima: Warrior's Shadow

Ghost of Tsushima's Warrior's Shadow is a sword kit with the description "The shadows are deepest before dawn" It is one of the appearance upgrades for the Sakai Katana that you can buy from merchants.

The shadows are deepest before dawn.

Acquiring Warrior's Shadow

You can buy it from merchants at the cost of 15 flowers.

Merchants sell not only sword kits, but also bow kits, armor dyes, and hats. 

Visit our Ghost of Tsushima 100% Walkthrough to get more details.