This subgame is now old but still enjoyable. It has a lot of content (brewing potions and alcool), classes, biomes, and even an endgoal (rings), the help/manual is well integrated in the game. The survival game is really fun, I loved the exploration (always wanted to visit Lorien).
The varied decorative nodes makes the creative game really fun too.
The divide/alliance between mobs and player classes can be great for a multiplayer server too.