Background
One of only four special grade sorcerers in the modern era. Yuki's innate technique, 
Star RageStar RageInnate TechniqueYuki adds mass that doesn't exist. Virtual mass, weight without physical substance, applied to her body and her shikigami Garuda. A punch from Yuki can carry the impact of a fallin..., adds virtual mass to herself and her shikigami, punches that carry the weight of a truck, kicks with the mass of a building. At maximum output, the virtual mass creates gravitational effects.
Yuki chose to die fighting 
KenjakuKenjakuHumanAn ancient sorcerer who has survived for over a thousand years by transferring his brain into different host bodies. Each body grants him access to that person's innate technique w.... When conventional combat couldn't kill the ancient sorcerer, she applied infinite virtual mass to herself, creating an actual black hole intended to destroy them both. KenjakuKenjakuHumanAn ancient sorcerer who has survived for over a thousand years by transferring his brain into different host bodies. Each body grants him access to that person's innate technique w... survived only because he possessed the one technique in existence that counteracts gravity. One of the four strongest sorcerers alive looked at the situation, did the math, and chose mutual destruction as the optimal play.
Known techniques
Innate Technique
Star Rage
星の怒り
Chapter 205
Yuki adds mass that doesn't exist. Virtual mass, weight without physical substance, applied to her body and her shikigami Garuda. A punch from Yuki can carry the impact of a falling truck despite her normal human frame. Garuda's dive attacks hit like meteors. At maximum output, the virtual mass becomes extreme enough to generate gravitational effects. And at absolute maximum: the point of no return, infinite mass creates a singularity. An actual black hole.