One of Eva's twin sabers, looted by Carl — inert alone, magical only when paired with its missing Right Fang.
The Left Fang of the Green Sultan is one of Eva's twin enchanted sabers, which she dropped in the gore of the train cab when Princess Donut raised Hekla's corpse; Carl pockets it. It is part of a matched set and offers no buffs or powers on its own — magical only when wielded together with its counterpart, the Right Fang. That makes it doubly valuable to the party: not only a looted weapon, but proof that the hostile Eva has lost her main armament.
Katia Grim practices with it in her smaller form.
A curved saber of a matched set, unremarkable and inert while separated from its twin.
A looted half of Eva's paired sabers, useless alone but a blow to Eva's arsenal.