User blog comment:Zelron/Soul of the Dragon (Why the soul gotta be black?)/@comment-30303790-20121002192452/@comment-30303790-20121002232455

Tricked by oath at first yes, but as he indicates his time spent in the Soul Cairn has had an effect on his ability to leave. It's done something to him beyond the obvious physical damage/decay.

As far as my "not impossible" comment, I meant from a non-lore breaking stand point. Sort of a retort against the idea it's a plothole...though I see how I sounded a odd.