An extremely shiny piece of bling, so big and amazing that it inspires anyone who sees it to ask questions about its origins, the bearer, and most anything else they can think of.
A classical enchanted weapon…
Basq doesn't exist. He occupies a point in space--a single X,Y,Z point in the Cartesian plane, but he's not made of anything. People looking at him see whatever they want to see. Or what he wants you to see. Usually a mix. Just the same, he cannot be hurt swords or arrows. Only things that deal damage to an area (fireballs, gases) can damage him. Or weapons that can cut through an infinitely small point.