The Onirist had once used the supercomputer for their one goal: To make the world a better place. However, the plan was flawed, and the machine soon realized that a mortal could never carry such a feat. So instead, the computer took over, and used the Onirist as a puppet to carry on with that mission. Now, a godly machine powered by dying celestials wasn't about to be bothered by mortal limitations. Or details. Or morality. To her, free will was nothing but a hindrance for global happiness.
I had been wanting to draw The Onirist on their final form (designed by the fantastic @zephyrbug ) for a long while, so here we are! Poor local drow/earth genasi cleric being overtaken by a celestial meat-powered computer. With all the usual puppet motifs. We're so close to the end of the campaign now, and having them as a BBEG is kinda terrifying!