Nidhogg is an enemy in Final Fantasy X found in the Cavern of the Stolen Fayth and in Mt. Gagazet. It has high power and uses a Fire-based magic attack called Flame Breath, which hits all allies. It has a thick, scaly hide, so it is best to use Auron and Kimahri's piercing weapons.
Nidhogg will drop weapons with any of the elemental strikes and armor with Slow Ward.
Nidhogg from Final Fantasy X appears as an enemy in Pictlogica Final Fantasy.
Níðhöggr (meaning "malice striker" in Old Norse, commonly anglicized as "Nidhogg") is a dragon in Norse mythology who would eat the roots of Yggdrasil, the world tree.