Fafnir

"A mighty undead who resides in the dark abyss."

- In-game description from Echoes.

The Fafnir (ファフナー Fafunā) is an enemy-only Monster class first introduced in Fire Emblem Echoes: Shadows of Valentia. The stronger variant of the Necrodragon, the Fafnir boasts high Defense and Resistance that render it difficult to slay. It appears rarely in Duma Tower, Fear Mountain Shrine and Duma Temple.