for those of you wondering about the "Tyrfing" thing last night: it's a sword from Norse mythology, also something something Castlevania something Fire Emblem. I'm thinking of using it in my fic, but wanted to make sure I didn't immediately get flooded with "oh it's that one thing from $GAME!" associations, but it looks like it's obscure enough that I'm good. XD
here's the mythological Norse sword: https://en.wikipedia.org/wiki/Tyrfing
@green shows up prominently in Walt Simonson’s “Ragnarok” too. Can’t praise that comic highly enough.