This author does a great job of researching and recounting the history of the Indo-Aryan ecstatic warriors...the Berserkers. If you seek a closer walk with the Ancestors and are hungry to learn about the Wolfskins and Bearsark warriors of the ancient times, I recommend this.
https://www.youtube.com/watch?v=zEXXA0naXkk&ab_channel=DanDavisAuthor
https://www.youtube.com/watch?v=zEXXA0naXkk&ab_channel=DanDavisAuthor