Create + Sable : Server Spawn/Spawn Anchor on airship/subspaces

When a player has no bed spawn, the mod checks for a World Spawner block and sends the player there on respawn. Should no bed and no World Spawner be present, the game reverts to the default world spawn point. Players still use their bed spawn first, so the block only applies when a bed is missing.

The block is meant for multiplayer servers, where an admin can place it on a Spawn Platform to set the server spawn. It is placed by hand, so a server can move the spawn anywhere a platform is built, including onto a moving Sable subspace such as an airship. Setting down a fresh World Spawner deletes whichever one was there before.

The World Spawner is nearly unbreakable for normal players, while admins, creative mode and commands can still remove or replace it. It is a low-profile block two sixteenths of a block tall, with a brass-table style texture and a center gem drawn from original textures rather than Create's. Create and Sable are both required, and the mod runs on client and server, so the server and every player need it. It is released under the MIT License and is not open source.