Acanthophis
Acanthophis is a Starmetal Rapier that is currently wielded by Fionn Swiftbraid. It is part of a set along with the Viper Blade and the Serpent Armor although there is a rumoured 4th piece of the set.
This blade was made from a starmetal ingot The Orbwalkers recovered from an armory lost at the start of the battle in Klurikon against Darvissa's forces.
Gerburgh the quartermaster forged the blade but it was a suspected Fae only known to the party as Riffok who carved the snake design on the blade and thus enchanted it and made it part of the set.