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.