Nidhogg's Tail is a formidable weapon resembling the sinuous, scaly appendage of the mythical dragon Nidhogg. It features a long, flexible structure with overlapping dark green and black scales that shimmer with a subtle metallic sheen, giving it a menacing yet majestic appearance. The tail tapers to a sharp, barbed tip, capable of delivering piercing attacks, while the base is adorned with intricate Norse runes carved into the flesh, glowing faintly with an eerie green light to signify its cursed power.