Complex sentence: To hone his skills, Gersen spends time as a "weasel," a police spy in the lawless Beyond and iis sent on a sensitive mission in which Kokor Hekkus is reputedly involved.
Split into simpler sentences: To hone his skills, Gersen spends some time as a "weasel", a police spy in the lawless Beyond. He is sent on a highly sensitive mission in which Kokor Hekkus is reputedly involved.