The Black Calamity Stone is only capable of suppressing the Black Calamity Insects and not driving them out. It was a special crystalline object condensed from the Black Calamity Insect King's corpse using some kind of secret technique. That was why it was able to suppress the Black Calamity Insect.
Appearance[]
It was a black crystal about the size of a human head. The crystal was as smooth as a mirror and emitted waves of bright black light that rippled outwards like black waves. One could vaguely sense a peculiar energy fluctuation from the black light.