Sound Breathing: Blood Demon Style

For many, the night is a time of solace, bringing rest and slumber, peace and quiet.

For some, the night represents that which is unknown, the monsters that hide within the dark, lurking around twilight corners and within silent alleyways.

For those who choose to peer further, to investigate the alleyways and unveil the hidden monsters, the night becomes a time of horror, bloodshed and war, revealing the fragile reality of peace in this world, revealing the abominations of man that stalk the night — Demons. Those who've witnessed these monsters of the dark will never be able to return to a life of solace in the night, now cursed with the knowledge that something truly dangerous lurks within the dark. These burdened few will do one of two things: fear the night, or fight. 

The Demon Slayer corps is an organization hundreds-strong that has existed since ancient times, dedicating its existence to protecting and safeguarding humanity from these demons, vanquishing the monsters of the night with the might of human swordsmen trained to combat this twilight threat through specialized breathing techniques — infusing the fragile bodies of mere men with strength rivalling those of the demons themselves.

You are a part of this organization as the only remaining practitioner of Sound Breathing, following former Hashira Tengen Uzui's retirement, and although you may not be officially recognized by the government, your task is to slay any and every demon without exception in an effort to protect those unaware of the demons and the danger they bring.

You are humanity's first and last line of defence against the demons. The lives of countless innocents depend on you.

Do not fail them.

Blood Demon Arts

At 3rd level, your demonic blood begins resonate with your Sound Breathing techniques. You gain the following two Blood Demon Arts.

Blood Demon Art: Resonant Blade. As an action, your blood coats your held weapon and it thrums with imbued sonic energy, using your Blood Demon Art. For 1 minute, you add your Charisma modifier to damage rolls made with that weapon (with a minimum bonus of +1). The weapon also increases its reach by 10 feet and emits bright light in a 20-foot radius and dim light 20 feet beyond that, releasing razor-sharp blades of vibrating blood. If the weapon is not already magical, it becomes magical for the duration.

You can end this effect on your turn as part of any other action. If you are no longer holding or carrying this weapon, or if you fall unconscious, this effect ends.

Blood Demon Art: Resonant Strike. As a bonus action, your blood seeps into your held weapon and vibrates at an uncomfortable frequency, using your Blood Demon Art. For 1 minute, the next time you hit a creature with a weapon attack before this art ends, your weapon crackles with sonic energy and the creature takes (1d10 x one-half your levels in this class, rounded up) thunder damage. The creature must make a Wisdom saving throw. If the creature fails its saving throw, your art resonates with the creature's blood, stunning it until the end of its next turn.

Sound Breathing Techniques

You gain Sound Breathing Techniques at the paladin levels listed.

Sound Breathing Techniques

Aura of Determination

Starting at 7th level, your flashy attacks and flamboyant techniques put your teammates at ease, instilling confidence and hope. As a result, you and friendly creatures within 10 feet of you can’t be frightened or restrained while you are conscious.

At 18th level, the range of this aura increases to 30 feet.

Musical Score Technique

Beginning at 15th level, you can analyze an opponent's movements and translate that into a musical score, allowing you to predict their attacks and see gaps in their defences.

As a bonus action, select one creature that you can see. Whenever the creature makes a weapon or spell attack against you, your AC increases by 1 and your attack rolls gain a +1 bonus against that particular creature, to a maximum of five times.

You may use this feature twice, and you regain all expended uses of it when you finish a long rest.

Demon Slayer Mark

At 20th level, as an action, you can emanate an aura of sunlight. For 1 minute, bright light shines from you in a 30-foot radius, and dim light shines 30 feet beyond that.

Whenever an enemy creature starts its turn in the bright light, the creature takes 10 radiant damage.

In addition, for the duration, you have advantage on saving throws against spells cast by fiends or undead.

Once you use this feature, you can’t use it again until you finish a long rest.