Reupload from my deviantArt.

A monster that was never grounded in one location or limited to one shape.

Powers: Among the Twenty Primal Demons, Infidelis was one of the less violent, as it rather wait for the Sunguard to come to it rather than the other way around; but as its enemies came to do battle, the creature would face them with its morphing abilities, as its body mass and composition allowed it to move at incredible speeds, and shift constantly, avoiding any damage easily, and then trapping Sunguards by launching projectiles composed of the same slime as the creature. But it with extended battle that Infidelis became more dangerous and erratic: due to the constant blasts and strikes of light and heat from the Sunguard, Infidelis's body began to overheat, and soon found itself turning into dark vapors; not only that, but it learned how to change from it's slime composition to a fully gaseous form, which the creature began to prefer, as it could transform itself into violent sentient storms and tornados, unable to be hit or damaged.

Defeat and Aftermath: With Infidelis now almost always present in its gaseous composition, the Sunguards that fought the Demon became unable to do so, while the rampaging storm continued lashing out against them. Using their power and primitive rituals, the Sunguards created a special weapon, with a blade that burned with no fire. When Infidelis prepared to strike at them once more as a powerful hurricane, the Sunguard tricked it by striking back, which made the monster take a more defensive stance as a living storm. Without any signs or warnings the weapon was tossed, passing through the Demon, but as it reached its outer edges, it dragged the entirety of the storm with it, with imense pressure and strenght, and where it pierced the ground, the weapon fused with it, locking Infidelis in its vapor form, leaving a constant storm around the weapon, both protecting it and trapping the Demon where it stood.