Magical Barrier Particles

Magical Barrier Particles is the term coined to name particles of an anti-Magic poison.

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 is to weaken their Magic but to also slowly poison them. Said poison is lethal, specially to Mages.