Odin's Zantetsuken is a legendary greatsword with a sleek, elongated blade that tapers to a sharp point, embodying the power of the dark knight. The blade is forged from a mysterious, dark metal that appears to absorb light, giving it an ominous, almost ethereal glow. Intricate runes are etched along the length of the blade, pulsating with a faint purple energy, symbolizing its connection to Odin's might. The hilt is wrapped in dark leather, providing a firm grip, and is adorned with silver accents that contrast sharply with the blade's dark hue. The crossguard is designed to resemble the wings of a raven, adding to the weapon's menacing aesthetic.