there is often not much one can do when objects of fel origin start to infect a living being this also goes for object of half life aswell, Aesma being a creature of half was was thought to be immune to demonic corruption or influence because they were created by demons in the first place, however it would appear that the chaotic energies are always twisting the warped. for the death knight a warrior of bone and frost the transformations would be interesting, however Aesma is a knight of blood and steel his tranformations seem to reflect his up front fighting style shaping the bone in his arms into backup weapons should he ever seperate from his accursed hammer, as a knight known for parrying rather than carrying heavy metal sheilds he could create an array of blades but seeing behind him to block was always a problem it would appear the fel power has taken care of that using something akin to kilroggs eye (or sauron cause lel) many of his powers will have been permanently affected by this, though i doubt he cares too much a fel guard being summoned wouldnt be too bad though i dont think he would approve the random succubi. In anycase it wont matter too much unless he can find away to control it hide it from sight or vent it out into something, where would you find a willing container