Ebb was attacked and raided by Lotor's Forces and Sven was captured. The prison ship on which he was transferred accidentally crashed on Planet Doom where Sven went into hiding becoming a hermit within the caves. He eventually encountered Allura's cousin from the Planet Pollux, Princess Romelle, who had been sent to the slave mines after she rejected Lotor's advances. During Sven's time on Planet Doom he witnessed Zarkon and Lotor's cruelty to their slaves, which drove him to the point of madness. He recovered thanks to Romelle's emotional support and helped her escape Doom. Sven was later reassigned to the Planet Pollux with Romelle and her brother Prince Bandor. Sven eventually fell in love with Romelle, though he was reluctant to pursue his feelings because he felt he was unworthy of her.
