"Void Turbulence? Void Realm channels?"
Since this was considered esoteric knowledge, Ash didn't find it strange that Igula was also unfamiliar, "This is a relatively rare Mage disaster. When a Mage establishes a connection with the Void Realm through the Gate of Truth, some areas of the Void Realm are unstable and will backflow knowledge into the Gate of Truth, causing the real world's space to be mutated by the knowledge of the Void Realm."
Igula gestured, "Imagine the Void Realm as a big jelly, and the Mage enters the jelly through a straw, normally without issue. But if a section of the jelly rots and dissolves, the liquid inside travels up the straw to the real area, corroding and boring a hole through reality… That is Void Turbulence."