Combination Spell: Tempestorm

Combination Spell: Tempestorm (合呪・陣風烈火 (テンペストーム), Aiju: Tenpesutōmu lit. Gale Raging Flames) is a combination of wind and fire that unleashes a powerful tornado of both.

Description
A Combination Spell is exactly as it says on the tin—it is a combination between two magics, not dissimilar to that of a Unison Raid; however, it is notably somewhat weaker than a Unison Raid thanks to the user being the only mage who unleashes the spell. Tempestorm is a Combination Spell between Wind Magic and Fire Magic that is one of the user's most powerful spells—when performing the Combination Spell: Tempestorm, the user sheathes their blade suddenly; but not before gathering several wind currents around the blade, before channeling flames upon the blade, which is supporting the currents. This causes a powerful reaction as the wind currents begin to "carry" the flames generated; essentially engulfing their blade in flames. By sheathing their blade, even if only momentarily, the user is capable of intensifying the flames before unsheathing once more, releasing the fire which is bolstered by wind outwards which then instantly expands into the form of a blazing cyclone that tears through the area, moving in a straight direction while slowly drawing in anything around it; simultaneously, the tornado releases long torrents of flames from them, which move to hit the enemy in a spiraling formation. Each connecting strike seems to generate a powerful, burning explosion. With its wide, encompassing range, the technique allows for staving off multiple opponents and is also shown to be able to instantaneously warm the body even under extremely cold temperatures. It is also useful in a stealth sense, as it requires no hand motions or incantations and can thus be impossible to predict. Opponents have a difficult time defending against it due to the speed at which the tornado of flame rotates; dealing dozens of powerful strikes per second in order to overwhelm them by simultaneously burning and slicing them with the power of fire and wind, respectively.

Trivia

 * Interestingly, the user refers to Combination Spell: Tempestorm as its Japanese name, Jinpū Rekka, instead of its English one; the reason for doing so is unknown.