Ghost of Tsushima: Serpent Strike Headband
Dyed the shade of a venomous snake, so beware the wearer's bite.
Acquiring Serpent Strike Headband
You can buy it from Kamiagata merchants at the cost of 20 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.