I needed information about the customs of the Scythians, so I read and read and found this:
"Scythians who decided to become brothers swore an oath of loyalty to one another. They would then cut their arms with a sword and pour the blood into a cup of wine. By drinking this mixture, the Scythians became sworn brothers for life. The oath-taking ritual also included an exchange of weapons."
"A Scythian who killed an enemy for the first time had to drink the enemy’s blood after the battle; warriors presented the king with the heads of the enemies they had slain, thereby demonstrating their military valour. The scalps were removed from the slain and hung on a horse’s bridle. Cloaks were made from the skins of the slain enemies. Quivers were lined with the skin of the enemy’s right hand, and bowls were made from the skull of the most hated enemy."