Annihilation

The Annihilation or Codename: Shell is an ability weapon.

Background
It was made by Herbert George Wells in Europe during the end of the war.

Description
It is initially inside a black briefcase and made of antique camera surrounded by shock-absorbent resin and has the capability to destroy everything within miles. It's maximum temperature is approximately 180,000℉. If activated, a crimson magic circle would appear around it.

It has the ability to melt everything on its path. Not even Dazai can nullify its plasma vapor. Akutagawa's Rashomon is deemed ineffective in ripping through its heat wave since its surface of discontinuity would close in a mere few seconds.