Implement a cemetery biome.

Hello.

I have a pretty big suggestion here. Implement an entire graveyard biome on the surface (not a cave biome like I've seen).

What will this biome look like?
There will be tombstones, stone or ice mausoleums depending on whether it's a hot or cold region. There will also be a new tree: the black mushroom tree. When farmed, it will yield black wood. The sky will be dark day and night; you won't see any stars. You'll only see the moon at night, and on full moon nights, it's red.

New structure?

Yes, in graveyard biomes, there will be the Temple of Death, representing the sixth element.

New mob?

Yes. There will be the elemental of death (like the Blaze for fire and the Breeze for wind). It's up to Mojang to choose the name! Unless you have some ideas! xD
There will be ghost villagers as well as skeleton versions of all friendly ground mobs. The elemental of death will only be present in the temples of death.

So? What do you think?

(Moderators, if anything is unclear, please let me know by email. I'm just a Frenchman using Google Translate ^^)