I believe once or twice I've mentioned a connection between Ancients and Idols, did I? I hope I did.
So... the thing is very complicating, yet here is what I can say for now to not to spoil that much of a plot: Reagkhay is not the Ancients' home planet. In fact none is.
Think about the planet as a testing ground, an old-old one. In fact, it isn't even a planet. Even Gkhalarer themselves (it's how the Ancients call themselves, original name of their species) have no suspicions about who they really are or were, really, really a very long time ago.
Everything started when a word of Grirdasses (connected post: https://www.patreon.com/posts/there-is-17404539 ) came to Idols' Creators (but at that time they haven't created them yet). The Creators started work on a few different projects, including one for preservation and one - for offence. The last one were Idols (as we name them today), and, well, the first one was guess what...?
It was the Reagkhay. A starting point of Creation.
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And I definitely over-spoiled a lot of things... oh welp, hope you enjoy it anyways!