The deceased Heart Stealers would offer their brains to the Elder Brain, which, after devouring them, continually elevated its biological level.
Su'en's corrupted genes replaced quality with quantity, with Elder Brains scattered across various Heart Stealer communities, firmly controlling every aspect of the Expedition Fleet. The new species they have cultivated over the past few centuries include the Shadow Heart Stealer, among other alien Heart Stealer variants.
The race corrupted from ancient times, even Heart Stealers, has become abhorred by their kind; within the Bizarre Realm, normal Heart Stealers would fight to the death upon encountering Su'en Heart Stealers.
They are Desecrators, Heretics, disloyal to the Main Brain's orthodoxy.
"Su'en... Su'en..."
Unlike other Main Brains, the Elder Brain, when idle, would murmur in whispers, repeatedly chanting the name Su'en.
