In an eddic poem loosely connected with the Sigurd tradition which is named Helgakviða Hjörvarðssonar, the reason why a man named Atli once had the ability is not explained.
Dalam puisi eddic secara tak langsung berkaitan dengan tradisi Sigurd yang bernama Helgakviða Hjörvarðssonar, suatu alasan kenapa seseorang bernama Atli memiliki kemampuan yang tidak bisa dijelaskan.