Contrary to popular belief, Viking Berserkers didn’t take hallucinogenic mushrooms to induce battle rage.
The rumor was started in 1784 by a priest named Ödmann, who suggested the famous battle rage of Viking Berserkers was a result of taking magic mushrooms. But there isn’t actually any real account of them doing so, and in fact were probably just in a self-induced hypnotic trance. No drugs. Just good old fashioned crazy.