Acrityrda is the hollowed out innards of a giant Atlas tree that've fallen down. The tree stood about 250 kilometers tall and was the largest
of them all when Terrahypt was still united with Zerana. During Yluxa, the tree got pummeled by gravitational forces which made it tilt. When
it started to decay, it fell down and slammed into the dried up sea.
Now the fallen log is mostly buried underneath the Dark Keigan desert, and only a third of the entire log is visible above it. The log itself have
provided a great shelter from the enveloping clouds of svibra which is dangerous to be exposed to.
Under thousands of years, trillions of cubic meters have been hollowed out from the log to make the subterranean world it is
today. Acrityrda is now the main capital of Dark Keigan. It is not exactly densely populated because all of the inhabitants have made the
settlements inside it into towns which only about 100 to 1000 people inhabit. But multiply the number of towns it exists in Acrityrda and you will get
about 7 million people.
Due to the thousands of years of carving and hollowing, 98% of Acrityrda are abandoned passages and halls which inhabitants
will have to navigate through to get between towns. But unlike Dark Keigan, it is considerably safer...
Only if you have enough provisioning and has nerves of steel.