Rasenmon Fury Mode

Rasenmon Fury Mode is a Bewitching Beast Digimon. A ruthless, nine-tailed Mega level Digimon that became unable to control its dark power due to the large volume of negative emotion data that got mixed in while it was digivolving from Ultimate level. The moment its digivolution is complete, its body comes under the full control of its rampaging power of darkness; what results is an entity of destruction that devastates all in its surroundings solely on impulse. It suffers from inner conflict stemming from its fear of and attempts to reject the swirling negative emotions inside of itself, which gave rise to its destructive impulses and subsequently its vicious personality.

Attacks
 * Desperate Vortex: Extends its large, spiral-shaped tails and skewers the opponent over and over again.
 * Predator's Bite: Pounces on the opponent, devouring their Digicore directly.
 * Spiral Hell: Rotates the blades on its wrists at high speed, creating tornadoes that indiscriminately tear apart everything in their surroundings.

Etymologies
Official romanization given by the Digimon Reference Book and used in the franchise. Digimon ReArise shortens "Fury Mode" to "GM" based on its Japanese rendering.
 * Rasenmon: Fury Mode (ラセンモン：激昂モード)
 * Ja: Rasen (ラセン).
 * En: Fury.
 * Mode. From Mode Change.

Digimon ReArise
Rasenmon Fury Mode digivolves from Stiffilmon.