Magical Barrier Particles (魔障粒子 Mashōryūshi) is a term that refers to poisonous anti-Magic particles.
Description
Magical Barrier Particles, also known as Anti-Ethernano, take the form of a black mist that quickly spreads in its environment. They feed on the Ethernano in the atmosphere and contaminate it, causing anyone that breathes it in to become poisoned, as well as have their Magic weakened. Said poison is lethal, especially to Mages.[2]