Please read the pinned post on creating new biomes and dimensions. Remember that individual items, mobs, and structures should still go in their own categories - this is not a category for entire updates.

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5443votes
(Dimension) Sky lands under review
6681votes
Oasis under review
2329votes
Giants Biome under review
5290votes
New Biome Called Cherry Blossom Grove under review
2998votes
Biome: Magic Forest under review
2218votes
Add natural events to the Nether. under review
1327votes
Dream Biome! under review
3417votes
Sandstorms under review
2579votes
(Swamp) Fog under review
1434votes