To be honest, I quite like RorrKonn, don't see why you want to change it, and to be honest, I like it even more now you gave a background for the spelling!

If you insist on changing it though, what I would do is look into the Gothic language and take it from there.  I say "Gothic" cause looking at your art, and some of the things you write, I'd say you're Gothic at heart.  When the word Gothic is mentioned, people probably think of vampires and stuff like that, but actaully, Goths and the styles and imagery that encompasses it, is all very real.  Gothic is real, in architecture, in people's personalities, and even in language, Gothic is a real language.

There's a massive amount of sites dedicated to the Gothic language and Gothic dictionary, but to make it easy to create a name, there's even translators that can convert Gothic to English and English to Gothic.  So all you would need to do is to create a name in English and use English to Gothic translation.  So if you want a dark and/or dangerous sounding name, here's a few examples:

• UsQuisjan (Gothic for "Kill")
• Ubils (Gothic for "Evil")
• Drauhtinon (Gothic for "War")

What happens, when you type this stuff into the translator, is that sometimes it gives more than one meaning for the word.  For example, the attached image shows the results I got for "Evil", and the name I picked out above, is only one of eight possible meanings and spellings.

And once you have a word or two converted that you like, you can go even further and do what you did with your current name, and change the spelling.  For example, the name "UsQuisjan" I pointed out above, you might change it to "Uquizan" or something similar sounding.  And finally, after you have a name that you like the meaning and sound of, you can even look-up what the Gothic equivalent of those characters are, because yes, due to being a real language, Gothic also has an alphabet too, the Gothic Alphabet.

You clearly have a Gothic personality, and the art in your gallery here literally screams "Gothic".
You no doubt love Gothic imagery, and very likely Gothic architecture too (join the club) ;-)

Anyway, here's the translator if you fancy a bit of genuine Gothic name creation:
Click Here for Gothic Translator