Shrooms and Bears
Vikings

The most elite Norse warriors were called Berserkers. They would get highly intoxicated with magic mushrooms and sometimes alcohol and wear a bear or wolf pelt instead of traditional armor. They would would fight as though they were in a trance and howl like wolves. They could not be harmed and seemed to feel no pain. They believed that they carried the spirit of the animal whose pelt they wore.

Ancient Antics
Hannah Ferrell