While it is part of the base set, it can also be summoned via Hist Grove.
- The Swamp Leviathan's appearance is similar to that of a Spinosaurus, a large piscivore dinosaur that lived during the early Cretaceous.
- The Elder Scrolls IV: Oblivion (Mentioned only)
- The Elder Scrolls V: Skyrim (Mentioned only)
- The Elder Scrolls: Legends