Aeternum is a survival anarchy server where hacks and exploits are permitted, so you can use aura, elytra flight, gravity block duping, and other tricks freely. The anti-cheat is set up to mostly ignore the usual stuff and only step in when something would actually damage the server's integrity, so the rules are pretty loose compared to most servers.
This is a persistent world too, so what happens here stays here. No rollbacks, no resets, just a world that gets shaped by players, conflict, and whatever chaos people decide to bring into it.
The server runs on a custom Folia fork for regionized multithreading, which helps keep things stable even when the server gets messy. There are also custom plugins for group management, feature toggles, and muting annoying noise, so the basics are there without making it feel overly controlled.
Most hacks and exploits are allowed, and bypassing the small set of blocked movement cheats and minor exploits will not get you punished. If you want a more freeform survival experience with very little interference, Aeternum is built for that.