In the year 228 BBY, the Nihil were devising a scheme: a raid targeting the Seswenna sector, with the planet Reventine as its focal point. Melis Shryke, a member of the Nihil, was chosen to lead this assault. Nevertheless, the planned raid was thwarted before it could be executed. Jedi Master Avar Kriss intervened by seizing control of Shryke's starship, known as the Cacophony, thus preempting the attack.
The High Republic: The Eye of Darkness, a novel from 2023 penned by George Mann, part of Phase III of The High Republic multimedia initiative, referenced the aforementioned raid intended for the Seswenna sector.