The Niflheim's Endurance Enchantment is a mystical artifact resembling a small, intricately carved runestone, imbued with the frosty essence of Niflheim. Its surface is smooth yet etched with ancient Norse runes that glow a faint blue, symbolizing endurance and resilience. The stone is set within a weathered bronze frame, showing signs of age and battle, with subtle frost patterns creeping from the edges, suggesting its icy origins.