Anathema Wars

The Anathema Wars were a galaxy-spanning conflict in the Crucible Galaxy involving multiple civilizations and spanning at least several years. They began when the Anathema was deliberately activated by the Galactic Senate Special Operations Corps in order to destroy LUCIS before he could mature into a form of the Basilisk. While the GSSOC was successful in effectively preventing the worst possible outcome for the fate of the universe, they traded it for another threatening entity.

Because the Anathema were considered a completely different enemy from LUCIS, the Anathema Wars at the time was considered an entirely separate conflict. However, with the benefit of hindsight on how preceding events relate to it, historians instead tend to classify the Anathema Wars as the final phase of the Chaos Crisis.