Sea Serpents and Haspids are the level 7 creatures of Cove. They can be recruited from the Maelstrom.
Sea Serpents and Haspids turn into Bone Dragons when placed into a Skeleton Transformer.
Tactics and info
Creatures with Slayer (any level) on them have increased attack against Sea Serpents and Haspids.
Haspid is the only normally recruitable level 7 unit that can kill an Archangel in one-on-one combat, alongside the Ancient Behemoth, of course.
Special ability Revenge
Haspids have an increase to their damage parameter before the attack by this formula.