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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6523votes
(Dimension) Sky lands under review
8254votes
Oasis under review
3807votes
Biome: Magic Forest under review
2630votes
Add natural events to the Nether. under review
1626votes
Dream Biome! under review
4384votes
Sandstorms under review
1638votes
2644votes
Giants Biome under review
3115votes
(Swamp) Fog under review