LegionCraft is a OneBlock server where you start on your island and keep grinding to expand your world.
The big thing here is the bosses. They are meant to be challenging and they drop keys you can use for rare loot.
There are crates with epic gear and rewards so you always have something to chase. You can also use chunk hoppers to help automate your island.
It also says it is not pay to win so it feels more fair when you build grind fight and loot.
OneBlock Bosses and Crate Loot
GG.MINEWIND.NET New Server IPOneBlock Boss Fights on LegionCraft
I found LegionCraft and it is a OneBlock survival server where everything is about building up from a single block and pushing your island forward.
There are challenging bosses and when you beat them they can drop keys for rare loot. You can use keys on crates to get gear and rewards.
It also has chunk hoppers so you can automate parts of your island. The server says it is not pay to win so it feels more fair while you build grind fight and loot.GG.MINEWIND.NET New Server IP