It appears I named my sword too soon. I thought Obsidian Fang worked great, because the sword is black, and I dance around with it, and because it's a long sword (46 inches) combined with a decent reach, it's like a fang piercing an opponent.
But Fluffy Bunny. If I could have said I lopped the siren's head off with Fluffy Bunny, that town invaders were slaughtered by Fluffy Bunny, it's not very Dark Elf but but how many people are going to cross paths with a fighter they not only know will most likely kill them, but will kill them with a sword that bears the name Fluffy Bunny?