Question: What sources, both before and after the pagan period, is the mythology derived from  that is also the mythology featured in Mats Wendt's 16 hour-long cybersyomphic work "Eddan - the invincible sword of the elf-smith"?
{'answer': 'medieval manuscripts, archaeological representations, and folk tradition', 'supporting_facts': [['Mats Wendt', 0], ['Norse mythology', 1]]}