This topic is about the different elements that Devon can wield as a Dragon Slayer. As some of you are aware or not, Devon wields the power of Dragon Slayer Magic which was meant to slay dragons. 

He has awaken that power when he met Starvlador, the Blue Dragon of Destiny and formed a contact to become his vessel. Unlike most Dragon Slayers who can wield one element or dual element, Devon can wield multiple different elements that Starvlador had given him. 

1. Fire Dragon Slayer Magic: 

Spells: 

Fire Dragon Roar:

Fire Dragon Iron Fist: 

Fire Dragon Wing Attack:

Fire Dragon Talon: 

Fire Dragon Sword Horn:

Fire Dragon Brilliant Flame: 

Fire Dragon Flame Elbow:

Fire Dragon Crushing Fang: 

Fire Dragon Grip Strike: 

Fire Dragon: Melt

Fire Dragon Blazing Inferno: 

Fire Dragon Pillar: 

Fire Dragon Slash: 

Fire Dragon Volcanic Crusher: 

Fire Dragon Flare: 

Fire Dragon Cruel Sun: 

Fire Dragon Pride Flare: 

Fire Dragon Crazy Prominence:

Fire Dragon Kamehameha: 

Fire Dragon Grand Chariot: 

Fire Dragon Slayer Secret Art:

Flame Lotus: Fire Dragon Fists:

Flame Lotus: Exploding Flame Blade:

Flame Lotus: Phoenix Sword: 

Flame Lotus: Supernova (in reference to Heatblast and how he can increase his temperature to extreme levels)

Flame Lotus: Sun Destroyer 

Flame Lotus: Final Prominence 

Ice Dragon Slayer Magic: 

Spells: 

Ice Dragon Roar:

Ice Dragon Diamond Fist:

Ice Dragon Sword:

Ice Dragon Freezing Elbow: 

Ice Dragon Freezing Talon: 

Ice Dragon Wing Attack: 

Ice Dragon Cold Wing: 

Ice Dragon Dazzling Ice:

Ice Dragon Scales: 

Ice Dragon Freezing Drill: 

Ice Dragon Divine Lasso: 

Ice Dragon Slayer Secret Art:

Frozen North: Supreme Ice Blizzard

Frozen North: Freezing Edge

Frozen North: Hail Storm

Lightning Dragon Slayer Magic: 

Spells:

Lighting Dragon Roar:

Lightning Dragon Iron Fist: 

Lightning Dragon Raging Bolt:

Lightning Dragon Sword Horn:

Lightning Dragon Demolition Fist: 

Lightning Dragon Heavenward Halberd: 

Lightning Dragon Hammer: 

Lightning Dragon Jaw: 

Lightning Dragon Piercing Fang: 

Lightning Dragon Mjolnir: 

Lightning Dragon Beckoning Bolt:

Lightning Dragon Lightning Storm: 

Lightning Dragon Dragon Fist: 

Lightning Dragon Final Flash: 

Lightning Dragon Slayer Secret Art: 

Roaring Thunder: 

Thunder Flash Beam: 

Earth Dragon Slayer Magic:

Spells:

Earth Dragon Roar: 

Earth Dragon Rock Wall:

Earth Dragon Rock Avalanche:

Earth Dragon Rock Fist: 

Earth Dragon Rock Spikes: 

Earth Dragon Rock Mountain: 

Earth Dragon Talus:

Earth Dragon Gauntlets:  

Earth Dragon Rock Armor: 

Earth Dragon Earth Collapse: 

Earth Dragon Scales: 

Earth Dragon Ze Kitora: 

Earth Dragon Ga Merujio: 

Earth Dragon Ji Korumea:

Earth Dragon Slayer Secret Art: 

Supreme King Rock Crush:

Rumbling Mt. Fuji:

Sky Dragon Slayer Magic:

Spells: 

Sky Dragon Roar: 

Sky Dragon Whirlwind Fist: 

Sky Dragon Wing Attack: 

Sky Dragon Talon: 

Sky Dragon Heal:

Sky Dragon Storm Shred: 

Sky Dragon Storm Mail: 

Sky Dragon Sword: 

Sky Dragon Crushing Fang: 

Sky Dragon Wave Wind: 

Sky Dragon Wind Wall: 

Sky Dragon Burst:

Sky Dragon Burst: 

Sky Dragon Areo Burst: 

Sky Dragon Air Cannon: 

Sky Dragon Slayer Secret Art:

Shattering Light: Sky Drill:

Iron Dragon Slayer Magic: 

Spell:

Iron Dragon Roar:

Iron Dragon Club:

Iron Dragon Sword: 

Iron Dragon Scales:

Iron Dragon Hard Fist: 

Iron Dragon Lance:

Iron Dragon Lance: Demon Logs:

Iron Dragon Mallet:

Iron Dragon Spiked Club:

Iron Dragon Jaws: (similar to Steeljaw/Bashmouth)

Iron Dragon Claws: (a technique that turns the user's fingers into long metallic claws similar in appearance to Ghostfreak/Zs'Skayr)

Iron Dragon Lightning Cannon: 

Iron Dragon Bladed Spiral: 

Iron Dragon Tail Lash: 

Iron Dragon Slayer Secret Art: 

Karma Demon: Iron God Sword:

Karma Demon: Iron Spiral:

Water Dragon Slayer Magic:

Spells: 

Water Dragon Roar: 

Water Dragon Iron Fist:

Water Dragon Talon: 

Water Dragon Crash Dive: 

Water Dragon Slash:

Water Dragon Wing Attack: 

Water Dragon Slicer:

Water Dragon Cyclone:

Water Dragon Nebula: 

Water Dragon Grand Splash:

Water Dragon Shield: 

Water Dragon Water Vortex: 

Water Dragon Scales:

Water Dragon Bullets: 

Water Dragon Sky Ocean:

Water Dragon Pillar:

Water Dragon Slayer Secret Art: 

Raging Sea: Retaliation Wave:

Raging Sea: Leviathan's Rampage: 

Wood Dragon Slayer Magic: 

Spells:

Wood Dragon Roar: 

Wood Dragon Oak Spear:

Wood Dragon Forest of Swords: 

Wood Dragon's Thorn Path:

Wood Dragon Explosion: 

Wood Dragon Dense Cage:

Wood Dragon Tangling Claw:

Wood Dragon Needles:

Wood Dragon Scales:

Wood Dragon Thorn Eruption:

Wood Dragon Leaf Tempest:

Wood Dragon Flash: 

Wood Dragon Shackles:

Wood Dragon Slayer Secret Art:

Forest Deity: Spear King's Barrage

Forest Deity: Dragon Rebirth

Posion Dragon Slayer Magic:

Spells:

Posion Dragon Roar: 

Poison Dragon Twin Fang:

Poison Dragon Fang Thrust:

Poison Dragon Spiral Jaw:

Poison Dragon Scales:

Poison Dragon Guard:

Poison Dragon Twin Wings:

Poison Dragon Grip Strike:

Poison Dragon Sharp Horn:

White Dragon Slayer Magic: 

Spells: 

White Dragon Roar

White Drive: 

White Dragon Iron Fist:

White Dragon Talon: 

White Dragon Wing Rays: 

White Dragon Holy Breath: 

White Dragon Holy Ray: 

White Dragon Flash: 

White Dragon Rough Silk: 

White Dragon Holy Cross: 

White Dragon Scattering Bullet: 

White Dragon Plasma Beam: (a laser eye technique, based off of Upgrade's plasma eye and Tentaclash/Vilgax's laser eyes)

White Dragon Laser Ray: (a technique that allows the user to fire light rays from their arms; based on Way Big's cosmic rays)

White Dragon Morning Star: (a bright blinding technique based on Atomix's abilities;)

White Dragon Slayer Secret Art: 

Holy Nova:

Shadow Dragon Slayer Magic:

Spells:

Shadow Dragon Roar: 

Shadow Drive: 

Shadow Dragon Slash:

Shadow Dragon Haste:

Shadow Dragon Waxwing Flash:

Shadow Dragon Talon: 

Shadow Dragon Abyss: 

Shadow Dragon Blade: 

Shadow Dragon Eruption: 

Shadow Dragon Hell Breath: 

Shadow Dragon Shadow Ray: 

Shadow Dragon Hunting Grounds:

Shadow Dragon Black Abyss: 

Shadow Dragon Tail: 

Shadow Dragon: Sword Style: Soaring Dark Slash:

Shadow Dragon: Sword Style: Rapid Dark Thrust:

Shadow Dragon: Sword Style: Shadow Cutter:

Shadow Dragon: Sword Style: Pilar of Darkness:

Shadow Dragon: Sword Style: Shadow Storm:

Shadow Dragon Slayer Secret Art: 

Black Ragnarök:

Light Dragon Slayer Magic:

Spells: 

Light Dragon Roar: 

Light Dragon Blinding Fist: 

Light Dragon Shimmering Arrows:

Light Dragon Wing Attack:

Light Dragon Wings:

Light Dragon Solar Flare: 

Light Dragon Shining Impact:

Light Dragon Scatter Shot:

Light Dragon Photon Shield:

Light Dragon Kamehameha: 

Light Dragon Final Flash: 

Light Dragon Big Bang Attack: 

Light Dragon Spirit Sword: 

Light Dragon Stardust Fall:

Light Dragon Meteor Explosion: 

Light Dragon God Punisher:

Light Dragon Stardust Breaker: 

There are also some forms that Devon can turn into at will. 

Dual Element:

Dragon King Mode:

Dragon Force: 

Dragon Slayer Armor:

Dragon King Armor:

Dragon God Armor: (Berserk)

Dragon God Armor: (complete) 

And that's all I could think of, let me know what you guys think at the comments below, peace out!