Are the Thirteen Lords of Shadow still trapped in their pocket dimension prison, @TheEdVerse? I know there were creatures summoned in the Harper novels called shadevari, but not if they were the same creatures who tried to help Shar against Selûne and were later trapped by Azuth. AFAIK, the Thirteen Lords of Shadow are still trapped, but they're both clever and powerful. On the other hand, who's to say they can't get up to "better" mischief/more fun in that pocket dimension? I'd leave this to DMs. Little that we know of the shadevari can be trusted.
— Ed Greenwood (@TheEdVerse) September 27, 2018