Juuchi Yosamu

Juuchi Yosamu (十千夜寒, 10,000 Cold Nights) is the beloved blade of Hajime Nagumo, being one of his best masterpieces as a Synergist.

Appearance
Created based on Kaguya's original Katana as reference. Juuchi Yosamu is a Shinogi-Zukuri-style Katana with a moderately curved and slender single-edged jet-black blade, a black round Tsuba handguard that is decorated with simple yet elegant design of a gold crescent moon and three luminous sky blue teardrops made of Divinity Stone reminscent of falling snow and a Tsuka hilt wrapped in black Tsuka-Ito made of leather harvested from monsters of the Orcus Dungeon with a gold kashira pommel which has the design of a hawk with engraved on its top. On the right side of the Kashira pommel is embedded with a black magatama with a white dot in the middle in accordance to its motif as the Yin counterpart to its sister blade Yawarakai-Te. Its Saya scabbard is Jet-black made of Azanthium with a large gold Kojiri end cap and a blue sageo rope tied around the upper end.

Abilities
Juuchi Yosamu is an extremely powerful Katana of supreme craftsmanship, being one of Hajime's masterpieces. Forged from compressed Azantium ore of the highest quality by incorporating the Japanese swordsmithing method of folding steel to greatly enhanced strength and toughness into Hajime's superior Transmutation Magic, Juuchi Yosamu has tremendous strength and cutting power, able to cut through anything even steel with great ease. Being designed solely for physical attacks, Juuchi Yosamu's greatest attribute is its absolute durability due to being made solely from pure Azanthium the hardest ore in Tortus which is made vastly stronger by folding and compressing it sixteen times, further enchanted with Diamond Skin Magic. When its Diamond Skin Magic skill is activated, a shell of Mana is deeply condensed and hardened around the entire blade, significantly enhancing not only its defenses but also its slicing power, allowing Juuchi Yosamu to tremendously increase the damage potential and destructive power of Hajime's strength based swordsmanship, its near-indestructible durability can also defend against the most powerful attacks with immense ease, when augmented by Canis Lykaon's powerful darkness aura, it can even parry, redirect and strike Noint's Disintergration magic enhanced swords. Juuchi Yosamu is later enchanted with Age of God's Evolution Magic and Spatial Magic, significantly enhancing all of its attributes and allowing it to cut space itself, rendering impossible to defend against aside from Spatial Magic.