Woad Raider

Isatis indigotica is a blue pigment that is extracted from a plant of the same name grown on the British Isles. Celtic's warriors used it to flesh in the body before making it, making themselves look more brave and terrible, but also to the enemy to bring a certain fear.
The Celtics are guerrilla warriors, their marching in the jungle and the wetlands are incredibly fast, in the complex terrain to get rid of chase, attack the enemy defensive empty area, before the enemy's regular army arrived before the fight, and then attack the new target The When they attack will use a local called indigo pigment to blush themselves to receive intimidation of the enemy's effect, so they are known as indigo raid.