"You will help?" She smiles at Mateusz. "My lead was at Georgia State University. Some kind of...goat-people. I don't know if they have the item themselves, or just information about it, though. I...lack the abilities to approach them.
Obtaining a relic such as you describe shouldn't be a problem."
Spoiler: Julian, Brand, Liliana, MateuszYou believe you can place the image as an obscure part of perhaps the best-known Celtic legend: King Arthur's dagger, Carnwennen.
Spoiler: Liliana, MateuszIts name means "Little White Blade." It's best-known in stories for King Arthur having used it to cut a witch in half. Nothing seems to have been recorded of its powers, beyond cutting.