Possible Clues:

• Endless extra twists in saga
• Snorri Sturluson compliation: ''Prose ___''
• Put another E up here for Norse
• It's the wrong way to put another E on Norse
• Icelandic work
• Scandinavian myth collection
• Put an E back on for the Norse
• That's the wrong way to put on another E if you want to make it poetic
• Centuries-old Icelandic work
• Collection of legends