Void Seed (Thaumcraft 6)

The Void Seed is a component added by Thaumcraft 6. It is used to make Void Metal Ingots and Voidseer's Pearls.

It is dropped by collapsing Flux Rifts or created by Void Siphons draining nearby Flux Rifts.

Scanning it unlocks the Eldritch, but the research Delving into the Eldritch (Auromancy and the Crimson rites must be discovered)