Blood Breathing derives from Water Breathing.
However this breathing style is different from the others because it was created when Nezuko was in a battle with lower five as this technique is based off on her blood demon art in the cannon.
Weapon: Nichirin Blade
Color: Black
Demon Slayer Mark:
User: Nezuko Kamado
Forms: 9
First Form: Explosive blood- Like cannon Nezuko's blood demon art, the 1st form creates a powerful explosive when it makes contact with anything. It is very harmful on demon, but never to humans.
Second Form: Leech - The user is able to locate the heart and puncture it to drain the opponent of almost all of their blood. This leaves the demon unable to replenish/heal quickly, so they will have no choice but to wait to be finished off.
Third Form: Internal Bleeding Boil- The user unleashes seven critical slashes, and the open wounds gush out blood, and after a few moments, the blood is set on fire, burning the demon crucially wounding it.
Fourth Form: Pain Reversal - Depending on the amount of pain the user can handle, the user is able to dish out the exact amount of pain on their opponent. The success rate depends on how well the user can handle their pain.
Fifth Form: Blood Transfusion- Reversing the technique on their syringe , the user is able to inject hot demon blood into their opponent. The blood bubbles as hot as the Sun as it spreads throughout the opponent's body. Burning them from the inside and causing them to melt into bubbly mess.
Sixth Form: Pins n' Needles - The user makes multiple puncture wounds in a second and causes the demon to fall in a state of limbo. The feeling of thousand prickling sensations distracting them as the user rushes to behead them.
Seventh Form: Steady Beat, Calm Pulse - In a state where the user is badly wounded, the user would dodge the attacks as fast as light.
Eighth Form: Murasame- The user cuts themselves increasing their speed and strength matching the strength of a Twelve Kizuki.
Ninth Form: Trance- A recovery style that allows the user to instantly return to reality if they are under any hypnosis or any other state keeping them unfocused. It can also work on other people.