Toxic Fire Dragon Slayer Magic

Fire Demon Slayer Magic (火の滅鬼魔法Hi no Metsuoni Mahō) is a Caster Type Magic, Lost Magic, and a type of Demon Slayer Magic. Its only known user is Hayashi Aririki.

Description
Fire Demon Slayer Magic is a type of Magic that grants the user various characteristics typical of a fire demon: the ability to generate fire from anywhere on his body, skin impervious to fire and other traits. Fire Demon Slayer Magic allows the user to produce and control fire from any part of their body, which can be used both in melee and as a ranged form of offense. Flame incorporated in this type of magic is of incredibly burn, being particularly destructive. Its user can also consume external sources of flaming and fire to restore their body and replenish their strength reserves. However, this won't work for fire, that they produced themselves. Unlike most other slayer, in the Hayashi's case, his flame by unknown reasons doesn't burned his friends, or somebody, who is dear to him, and this type of magic can not be copied, rather than the transmitter by blood or by inheritance.

Spells
Fire Demon's Roar (火鬼の咆哮 Hioni no Hōkō): Hayashi generates flame in his mouth and releases it in a concentrated, destructive blast, capable of destroying everything in a wide area in front of him.

Fire Demon's Heat Haze (火鬼の陽炎 Hioni no Kagero): Hayashi shoots a stream of fire from the palm of his hand.

Fire Demon's Fire Fist (火鬼の火拳 Hioni no Hiken): Hayashi turns his fist into flames and launches it as a column of fire at his target. This attack is so incredibly powerful that it is able to plow through several ships in one shot.

Fire Demon's Flamethrower (火鬼の炎銃,    Hioni no Honō Jū): Pointing the index and middle fingers of both hands at an opponent like guns, Hayashi turns his fingertips into flames and shoots bullets made of fire from theem.

Fire Demon's Flame Commandment (火鬼の炎戒 Hioni no Enkai): Hayashi amasses a large amount of flames around his body (usually by first swinging his outstretched hand around him, summoning the flames) in preparation for an attack.

Fire Demon's Fire Pillar (火鬼の火柱 Hioni no Hibashira): Used following Enkai, Hayashi shoots the collected flames straight upward, destroying a target above him. It can also be fired downwards to clear any enemies that might be below him while he's in mid-air.

Fire Demon's Firefly Light (火鬼の蛍火 Hioni no Hotarubi): Hayashi creates many small, glowing greenish yellow fireballs that float around an enemy. The idea behind this attack's name is that before he attacks with them, the small fireballs look like fireflies in the air. After releasing of "firefly" to send the fireballs floating around in proximity with the enemy, Hayashi sends them all flying into the target(s) all at once, burning them.

Fire Demon's Sacred Flame (火鬼の神炎 Hioni no Shinka) : Hayashi hurls long lances made out of fire. The lances have the combined effect of simultaneously burning an opponent while piercing them.

Fire Demon's Cross-fire ( 火鬼の十字火, Hioni no Jūjika): Hayashi puts his index fingers together in a cross shape before launching a cross-shaped column of fire directly at his opponent.

Fire Demon's Flaming Net (火鬼の炎上網, Hioni no Enjōmō): Hayashi creates a circle of fire around a selected area, preventing anyone from entering or leaving it.

Fire Demon's Mirror Flame (火鬼の鏡火炎, Hioni no Kyōkaen): Hayashi releases a wall of fire to block an attack.

Advanced Spells
Great Flame Commandment: Flame Emperor (大炎戒 炎帝, Dai Enkai: Entei): One of ultimate technique of Hayashi. After creating great spiraling flames centered on his location before amassing it at a focused point (i.e. the palm of his hand), Hayashi then turns it into a gigantic fireball resembling the sun and hurls it at his opponent to try to obliterate them.

Demon Force
Doemon Force: In demon force, Hayashi has black bird wings, horns, unknown red crystal in forehead, with unknown tattoo, and this tattoo is located on chest too. His body covered in brown "hair". In this form, his flame has few forms, named "colour", and each type of flame are powerful.

Black Colour - Illuminating Heaven (ブラックカラ: 天照 Burakku karā: Amaterasu): The flame of Hayashi changes colour to black. This is the most powerful flame of Hayashi, which, according to legend burns for three days and three nights. This technique can burn even fire, and it controls by Hayashi's eyes.

Green Colour - Charon's Wrath( グリンカラ：カロンの怒り Gurīnkarā: Karon no ikari) - The flame of Hayashi changes colour to green. With this, the power of fire increase, and with this fire, the real demons can be defeated.

White Colour - The Dragon's Fang (ホワイトカラ：ドラゴンの牙 Howaitokarā: Doragon' no kiba) - The flame of Hayashi changes colour to white, power of this fire stronger, than usual, and it can stop some kind of time portals. Flame has good effect to defeating demons.

Blue Colour - The Satan's Flame (ブルカラ：悪魔の炎 Burū karā: Akuma no honō) - The most powerful flame of Hayashi, that has blue colour. This flame, according to legend, the flames of Satan, burn all that wish to host. So powerful that only the body can withstand it, and the demon killer demons can withstand it.