Trident, Mahouka Vol 3

He set the "Wide Area Interference" from the Generator injured by the wall's collapse, the "outer shell of the Eidos", and "flesh" as the variables and plugged them into the Magic Sequence. The processes for all three magics were completed in a split second with no time lag in between. The first process decomposed the target's protective Wide Area Interference. The second process decomposed the target's Data Fortification used to protect the body. The third process decomposed the flesh down to the atomic level. The decomposition was so complete that it was no longer recognizable as a biological entity and left no traces that this was a living being. Proteins were broken down into hydrogen, oxygen, carbon, nitrogen, and sulfur; the bones were rendered down to phosphorus, oxygen, and calcium; everything including blood, the nervous system, stored nutrients, even waste was decomposed down to the molecules and ions.
The lighter elements, with hydrogen at their head, escaped through the hole in the outer wall to the outside. The flammable elements interacted with oxygen and burst into flames. This scene was so surreal that it seemed like the human body spontaneously ignited. Yet, the reality was that it had vanished rather than being consumed by the flames.
He had incorporated three consecutive Decomposition magics into one Magic Sequence and completely annihilated a Magician's flesh and body along with its naturally occurring magic protect barrier.