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"?
Norse mythology:  The northernmost extension of Germanic mythology, Norse mythology consists of tales of various deities, beings, and heroes derived from numerous sources from both before and after the pagan period, including medieval manuscripts, archaeological representations, and folk tradition.
i don't know