User blog comment:Inferno Pendragon/A Little Teaser/@comment-3237716-20161028181817

I'd change the "unable to die under any circumstances" in regards to immortality if you want Inferno to be a protagonist, by saying "unable to die under any circumstances" you suggest invulnerability and that is not really the kind of immortality you seem to truly be desiring for him..

if you *do* go for invulnerability do what I do with Toons, they can not be killed or harmed in conventional ways but have laws that balance out their otherwise "invulnerable" nature (such as fading away and Toon Physics).

if all else fails you can put invulnerability as a motive for Inferno to explore the multiverse, seeking out items or beings of power - seeking an opponent / item that can finally "kill" him off or provide a challenge (that's how traditional demigods are written).

immortality is a very common ability but it is also one that can cause some problems even with experienced writers, what I've read suggests you want a "semi-immortal" character rather than a truly invulnerable one.. that would be much easier to work with but you'd also have to stick rigid to any weakness or limits you give him or he will develop a "Superman complex".. (the reason Superman is disliked isn't because the character is bad but because his writers always come up with different weaknesses or limits, discarded previous ones at a whim.. this is an example of how not to write an invulnerable character - keep a constant weakness / limit and you'll do justice to the concept, otherwise you're best sticking with enhanced versions of pre-existing Pegacorn / Dragon abilities (which aren't to be shrugged at.. Inferno was one of the most powerful characters in old Battle Users canon.. ask anyone.. he may not need any "power boosts" in new canon.)