At one time ya couldn't swing a hammer or a sword without hitting one of these. ;^) By contrast Yggdrasil has always sounded like an over-the-counter pain remedy.
Thor spends a night with a mortal woman and the next morning he says, I have to tell you who I am,’ he began. Im Thor. She says, Youre Thor? I can hardly walk. ...........................
Christianized Viking Music from ancient days, dating from 1208:
https://www.youtube.com/watch?time_continue=53&v=e4dT8FJ2GE0&feature=emb_logo
Árstíðir - Heyr himna smiður (Icelandic hymn) in train station.