Riot Block MC is a new prison server that is non pay to win and not OP so it feels more balanced while you progress.
The big highlight is the Wardens Lair which is a huge cave system with mobs. When you beat them they drop cash so fighting actually matters. If you explore deeper you can find hidden dungeons and unique loot with better rewards.
If you want the classic prison vibe it also has a mine and grind progression path. There are dozens of custom enchants and the server runs regular community events.
