Niflheim (ニヴルヘイム - Nivuruheimu) is Yomi's Super Secret Ninja Art in Senran Kagura Burst and her Level 2 Secret Ninja Art in Senran Kagura Shinovi Versus. In both games it requires two bars of Ninja Art Energy to use. Yomi becomes able to use it in Senran Kagura Burst after clearing Chapter 4 Mission 05.
Yomi fires several shots from her crossbow weapon and then finishes with a shot from her large bomber-type weapon. In Senran Kagura Shinovi versus, she fires both bomber projectiles and crossbow weapons at the same time.
The name Niflheim comes from the realm in Norse mythology.