I found a free Minecraft Java Realm that is trying to build a small community. The world is in Hardcore right now so you only get one life and every death is a big deal.
The whole point is to see how long you can survive and not end up as the next death message. Later the owner plans to switch it to normal survival so people can keep building for a long time.
You join through their Discord and they give you a role then send the Realm invite.
FREE Java Hardcore Realm One Life
GG.MINEWIND.NET New Server IPOne Life Semi Anarchy Hardcore
Just Another Hardcore is a hardcore survival server where you only get one life and when you die you are gone forever. It aims for a mostly vanilla feel but it adds a few changes that fit the hardcore vibe.
The world never resets so every base and every mess you leave behind stays. It has statistic leaderboards and player heads can drop when someone dies. There is also a way to will your enderchest to someone if you die and there is a way to disable phantoms.
The server is semi anarchy so you can do what you want but there are some limits to help keep the world ok like lava casting being disabled and wither spawning near spawn being blocked. It runs on 1.21.11 and it supports joining on 1.21 plus.GG.MINEWIND.NET New Server IP