The Saga of Swamp Thing #31 was published by DC Comics on December 1, 1984, as part of a series that began in 1982. Alan Moore writes, and art comes from John Totleben, Marvin Kilroy and Rick Veitch. This 36-page issue features Swamp Thing, Etrigan, Abby Holland, Matthew Cable and Harbinger, among 7 characters cataloged on VerseDB.