The user can create, shape and manipulate fiery or otherwise extremely hot energy capable of burning anything it comes in contact with. This energy can be composed of extremely hot gas such as air, a magical energy, or actual fire.
Vegeta (Dragon Ball) uses the Shine Shot to fire a ball of flaming Ki.
Nuova Shenron (Dragon Ball GT) prepares the Nova Star, a ball of fire-based Ki.
Nuova Shenron (Dragon Ball GT) preparing a fiery Ki Blast.
Baby (Dragon Ball GT) prepares the Flaming Death Ball, a fiery variant of his Revenge Death Ball.
Samus Aran (Metroid) uses the Plasma Beam, depicted here as a beam of intense heat.
Domon Kasshu's (Mobile Fighter G Gundam) Burning Gundam can use Erupt Burning Finger technique, which can pierce the bodies of other Gundams and destroy them within with Heat End. It can also be projected in different ways...
...such as a beam of fiery energy...
...or a fireball.
The Burning Gundam's (Mobile Fighter G Gundam) ultimate technique, the Sekiha Tenkyoken, focuses all the power of the Burning Finger into a gigantic energy sphere...
..or be used in conjunction with the Sekiha Tenkyoken for the even more powerful Sekiha Tenkyo Burning Finger which forms into a giantic hand that crushed the opponent.
Ryu (Street Fighter series) performs the Shakunetsu Hadoken, a Hadoken imbued with fiery energy.