Nidhogg

Nidhogg is a dragon of Norse mythology, said to herald the coming of Ragnarok and is the final boss of BPM: Bullets Per Minute.

Boss Battle
Nidhogg's arena is a very large, completely flat area. Before fighting Nidhogg, the player must complete three battle-waves, similar to the Challenge Rooms. Like the Challenge Room, each wave is manually activated through a lever on the floor. The waves are comprised of high-level enemies and low-level bosses such as Draugr. Nidhogg's boss fight begins with the dragon rising from his platform and flying around. He will cast a familiar spell, the "expanding sphere" which must be rolled through when the sphere is stationary. At half health, Nidhogg lands on the ground and gains new attacks. He uses the "half expanding sphere" that must be avoided through strafing, and fire breath that launches out 4 Large Skulls.