Chaos Blast

Chaos Blast (カオスブラスト) is a variation of Chaos Control that only Shadow the Hedgehog is known to use. This move was introduced in Shadow the Hedgehog (game), and was originally designed to be used when his heart was full of evil. However, due to modifications through several games, Shadow can now use it without committing any acts of evil and is only required to charge enough energy, or enter his Chaos Boost form. Its appearance is literally a great shock wave of Chaos Energy that destroys all within 20 meters. During the development of this move, Shadow's eyes and stripes begin to glow. In the level Egg Dealer, if Shadow lined up three Shadow icons, he would activate Shadow Fever and instantly charge Chaos Blast.

Shadow can also use this move in Sonic Chronicles: The Dark Brotherhood, where it is a straight beam of energy shot from his palms. In Sonic the Hedgehog, it is a small blast of energy in the immediate 1 yard area around the user. Sonic and the Black Knight features a unique use of Chaos Blast, as Sir Lancelot uses it as a shield after it goes outwards a few yards.

Trivia

 * The Chaos Blast from Sonic and the Black Knight is also known as the "Aura Bubble" as it is more of a bubble than an explosion.
 * In Sonic Chronicles: The Dark Brotherhood, Chaos Blast is depicted as a beam of Chaos Energy instead of a shock wave.
 * Interestingly, in Sonic and the Black Knight, when Sonic hits Sir Lancelot using Soul Surge in the mission Lancelot's Return, Lancelot glows red and, after a few hits, will perform a Chaos Blast, meaning that he might be charging up to perform this attack while he was being hit.
 * Also in Sonic and the Black Knight, Amy Rose has a similar move called Rose Typhoon, which is a giant pink energy sphere. It is unknown what this sphere is made of.