Minecraft: The Season's End Update Mod

Adds:

Ores:

Enderium

Titanium

Woods:

Enderwood

Blocks with GUI:

Filler: Crafted out of 6 titanium dust and a hooper.

Extra Blocks:

Purpilium

Blue End Stone

Biomes:

Cherry Blossom Forest (Located in the overworld)

Autumnal Forest (Located in the overworld)

Winter Forest (Located in the overworld)

Purpilium Forest (Located in the end)

Ender Deltas (Located in the end)

Bland Ends (Located in the end)

Remaining Voids (Located in the end as a void biome)

Structures:

End Hut (Located in the end and all biomes)

Extra Facts:

Enderium and Titanium armor are stronger than all armors in the game, you can survive a 100 block fall in the boots (extremely useful for encountering the Remaining Voids)

The only other way to get down there is a totem of undying