Illumi Kosaka/Abilities

Keyblade Wielding
When Illumi was born, his mother let him touch her Keyblade, thus doing the right of succession.

Fighting Style
Illumi attacks with a fast one-handed style with his Chaos Ripper keyblade. Illumi attacks very quickly in combat, and is just as able with his weapons as Mako is with his. Illumi's base style is mild, fast and powerful, often letting him take control of the battle. But when it calls for it, his fighting style turns into an aggressive one.

Elemental Abilities
Thunder

Illumi can manipulate electricity, and is a master of it. With electricity he can shape and manipulate electricity, a form of energy resulting from the existence of charged particles (such as electrons or protons) which give the user control over electric fields, electric charges, electric currents, and electromagnetism. He can create/generate/increase, absorb, conduct, shape and manipulate electricity of various intensities. Charge objects with electricity, heat them and/or making them conduct electricity. Increase the sharpness of objects by using electricity to create vibrations. Electricity Solidification, electrical Constructs, including weapons, walls, armor or allies/servants and can infuse his sword with electricity.

Darkness

Illumi is also a master at manipulating darkness. With Darkness he can shape and manipulate darkness and shadows. By itself, darkness is mostly used to cloud everything into total darkness, but by accessing a dimension of dark energy it can be channeled to a variety of effects, both as an absence of light and a solid substance, create and dispel shields and areas of total darkness, create constructs and weapons. He can Create/generate/increase, absorb, shape and manipulate darkness/shadow for various effects, sizes, shapes and intensity levels. Solidification via controlling darkness/shadow: Animating/manipulate darkness/shadow, whether users own or cast by anything else. Tentacles/tendrils, chains and/or threads to attack or bind. Umbrakinetic Constructs, including weapons, walls, armor or allies/servants, he can also infuse darkness into his sword. He also has a dark form where his eyes iris's turn black, his fur and skin turn a greyish color and his strength increases exponentially.

Black Lightning

Illumi can also combine his darkness and electricity to make his own original ability, Black Lightning. He is able to create and control a dark mystical form of electricity, which, due to it's mystic nature and properties, ignores the limitations and weaknesses of normal lightning. Black lightning not only discharges energy, it shocks and destroys many things it touches, including regular lightning. While he can wield it much like its regular counterpart, he can also use its mystical power for wide variety of attack and effects. However he refrains from using it because it is difficult to control.

Magic
Illumi can uses all types of magic. Though darkness and thunder are his strongest

Miscellaneous
Beside a variety of abilities, Illumi has access to three exclusive Command Styles and three exclusive Shotlocks. His first exclusive command style is Black Lightning, which utilizes his Black Lightning ability to it's maximum. His second style is Volt, a second level style which uses his earth element and uses powerful, long-ranged ground attacks. His third style is Dark Impulse, a second level Command Style which uses the power of darkness and hits enemies with slow, heavy attacks, but also exhibits long-range projectile attacks.

Two of his exclusive Shotlocks utilize dark powers, Sonic Shadow and Dark Volley. His most powerful Shotlock, Black Electron, fires huge Black Lightning strikes from his Keyblade. Terra has access to Slide, which gives him good distance from his enemy, but it is not quite as reliable as Makos's Dodge Roll or Tayuya's Cartwheel. His Sonic Impact ability can extend from both Slide and Air Slide, allowing him to perform a charge attack mid-slide.

Keyblade
Illumi wields the Chaos Ripper Keyblade. The Chaos Ripper is a long Keyblade that appears chipped and very asymmetrical in its design. The handle is red-orange and is surrounded by a roughly rectangular guard. The guard is black, and has uneven, chipped spikes on each of its corners. The shaft of the blade is black with a faded bronze border along its edges, which are lined with prominent chips. The head of the blade is decorated by several chipped and oddly-shaped red-orange spikes with black tips, which also form the teeth. An eye of darkness is also set in the head of the blade. The Keychain token contains a second eye of darkness.