|Romanized Name: Nidhogg|
|English Name: Nidhogg|
|Literal Meaning: Devourer|
|Weight : 2,5 kg|
|Weapon type: Short Sword|
Nidhogg can store one ability of Yggdrasil at time, allowing its usage while in Midgard.
- Transformation : By using Yggdrasil's ability,Nidavelir, Syrus transforms it to different weapons.
- Flame Sword : It is able to withstand flames of Surtur, power of Muspelheim, without losing its color or being damaged.
Midgard Sword Techniques
- Fenris : Syrus moves within Midgard freely, allowing him move swiftly from place to another within range of Midgard. However, it is not teleportation but really fast movement. It takes lot energy.
- Jormungandr : Jormungandr is technique that extends range of Nidhogg's slashes to edge of area of Midgard. It is really Vacuum Blade made by swinging sword with enough power.