She returned for the final arc of the series, a crossover with the "DuckTales" comic also published by Boom!, where she teamed up with other female Disney villains and exploited black "slime" that could turn normal people evil and villains into stronger forms. She used it to bring in an army of villains from Duckburg and St. Canard, as well as a brainwashed Phantom Blot, and tried to seize both cities so she could have all of Scrooge McDuck's assets. To her dismay, the slime turned out to be a transformed Negaduck, who seized control of the plan before all the villains were banished to another dimension. This last arc was later rendered to be non-canonical, and not included in the omnibus collecting the series.