| 2025-12-04 | Multiheaded monster of myth |
| 2025-08-28 | Mythological beast able to regenerate its heads |
| 2025-07-11 | Sea serpent of myth |
| 2025-05-23 | Monster slain in one of Hercules' 12 labors |
| 2025-05-13 | Many-headed monster of myth |
| 2022-09-09 | Many-headed monster |
| 2022-08-20 | Enemy organization in Marvel Comics |
| 2021-01-09 | Sea serpent in the night sky |
| 2020-02-25 | Freshwater polyp |
| 2018-12-26 | Multiheaded monster of myth |
| 2018-08-20 | Freshwater polyp |
| 2018-05-13 | Monster slain by Hercules |
| 2018-05-05 | Monster slain by Hercules |
| 2017-11-02 | S.H.I.E.L.D.'s enemy, in Marvel comics |
| 2016-12-23 | Hercules slew it |
| 2014-02-10 | Nine-headed serpent of myth |
| 2012-05-20 | Monster slain by Hercules |
| 2011-08-09 | Many-headed challenge for Hercules |
| 2008-08-24 | Victim of Hercules' second labor |
| 2006-04-27 | Monster in the second labor of Hercules |
| 2004-04-27 | Many-headed serpent |
| 2003-09-01 | Nine-headed serpent |
| 2002-11-11 | Nine-headed serpent of myth |
| 2000-08-06 | Victim of Hercules |
| 2000-03-23 | Monster slain by Hercules |