An Ultimate Digimon whose hidden feral instincts have been set free. Lamortmon will immediately throw itself upon any Digimon that reacts negatively towards it and smash it repeatedly until it stops breathing. It is a very intuitive Digimon that cannot control its impulses, but there are some Lamortmon who are ashamed of and despise their own nature. The more Lamortmon unleashes its wild nature, the stronger and sharper the vacuum blades of the two giant swords ("Storm Beast") worn on its waist become. Calming down a rampaging Lamortmon is impossible unless one has already built up a great deal of trust with them.
Lamortmon's special moves include Kasaiso, an attack that slices open the enemy's belly, Koha Batto, in which the full might of its two giant swords are brought down to crush the opposition, and Fuga Rekkanjin, where vacuum blades are unleashed from Lamortmon's giant swords. Finally there is Gouon Kieizan, where all reason is replaced with pure ferocity and both of Lamortmon's giant swords are used to render the enemy in two. This is its most destructive technique, as it both slices the enemy and smashes them into pieces at the same time.