I figured he would. Any remnants of Darkiron that was found would be destroyed. Hellion woudl also elliminate any traces of Darkiron from history, if relevant to his location, or revival. Revival spells are forbidden in Hellion's domain, as people tend to like to use it on dragons to raise them from the dead and bind them to their will, and thus claim whatever the dragon owned. Sometimes, if given the chance, they use necromacy on people, and finish it before the casting can be stopped, as it was excused as revival magic before the casting began. So, the chances of reviving Darkiron are slim at best.