Before the conversion of Europe to Christianity in the Middle Ages, Germanic tribes roamed the continent, plundering villages and waging battles to seek the favor of Odin, their god of war, ecstasy, and magic. Centuries later, predatory Viking raiders from Scandinavia carried on similar traditions. These wild ôbarbariansö had a system of social classes and familial clans with complex spiritual customs, from rites of passage for birth, death, and adulthood to black magic practices and shamanic ecstatic states, such as the infamous ôberserker's rage.ö