Gizagiza Akuma

When Kisui is in his Bonded Spirits form, he attains a unique sword that was held by the ancient spirit within him; A serrated katana known as Gizagiza Akuma, the Serrated Nightmare. The serrated edges sharpen the air around Kisui as it moves through the grooves, giving him the perfect basis to control them with his Sage mode's natural energy. The blade has several serrated teeth and is three feet long from blade to hilt. The hilt is covered in black leather with a matching black sheath guard. The sheath itself is hand crafted from black wood, specially laminated with a thick coating to protect it from even the heaviest blows. The blade is made of Damascus steel, a type of metal no longer capable of being crafted, as the formula for it was long lost. This gives it a very durable durable base while being lightweight and easy to swing. Because it's made from Damascus steel, the blade has subtle grooves within the metal; A unique pattern found in Damascus steel weaponry.