Back to the normal scale. =] This was a quickish effort of a fury.
Marauder Furies are quite humanoid and find their targets mostly on battlefields, in the mist of war. The humanoid form is rather unusual since, there's always been wars, so this fury kind should be more degenerated than this. For some reason the Marauder Furies have kept a warrior-kind of appearance.
Marauder Furies have a taste for the kind of evil soul, which kills for its own pleasure, without any good reason or sense of duty. This kind of target is usually a soldier who keeps wars as a game. (Or has played too much shooter games)
Marauder Furies attack from the opposing side of the target, materializing in the enemy line or the side of who's getting killed by the evil soul, shooting first a piercing blast at the target from the cannon-looking part formed in their right arm.
The blast cuts off the 'evil arm' of the evil being and the Marauder sprints to it's target, eating first the fallen arm with it's right hand (as it's the only hand with claws that are capable of touching) and then sucking the evil soul with the weird, degenerated 'secondary head' developed in the Fury's left arm.
After the fury has fed itself, it goes to prey on a new target.