|Level||43 Rare Elite|
|Location||Zorammarsh, Tanaan Jungle|
- Piercing Bite — The caster lashes out, biting at all enemies within 15 yards in front of them, inflicting Physical damage to all players caught in their jaws. Victims of this attack are afflicted with Piercing Chomp, increasing the damage they take from future Piercing Chomps by 10% per application.
- Rolling Thunder — The caster spits out several bolts of lightning that bounce forward, inflicting Nature damage to all enemies caught in their path.
- Tail — The caster lashes out with their tail, inflicting physical damage and knocking back any players caught behind them.
- Vile Blood — Hydras all have blood that is toxic to their enemies.
- Keravnos is one of four max-level rare elite hydras on Draenor, the others being Typhon, Echidna, and Lernaea.
- Keravnos (κεραυνός) is Greek for "thunderbolt".
- Patch 6.0.2 (2014-10-14): Added.