Sulfur Plains, Green rain and Mega Geyser.

We need Sulfur Plains to be more abundant, basically appearing more frequently and considered a separate biome from Sulfur Caves, for example, using `/locate biome sulfur plain`. Additionally, for better atmosphere, you could add green rain that matches the green sky. Finally, add a type of geyser that is a 4-block square and has a higher power than the geysers that are a single block, something like when you plant 4 saplings together to make a giant tree.