Lord Darkar

Lord Darkar is the lead antagonist in the second season. He has also been called the Prince of Darkness by Miss Faragonda, but it is unknown whether he is the same Prince of Darkness mentioned by Darcy, when she first sees Riven and says that he has a level of negative energy equal to the Prince of Darkness. He appears in Season 2 only, but makes a few cameo appearances in season 3 and 4, and the season 5 trailer.