Download 12w21a:
Client: http://assets.minecraft.net/12w21a/minecraft.jar
Server: http://assets.minecraft.net/12w21a/minecraft_server.jar (or EXE)

This is an video of all the updated features found in Minecraft Snapshot 12w21a.
Tons of changes in this amazing update. This is my first snapshot review.

New Features include -
-Emerald (Currency) - Mineable via Emerald Ore
-Trading with Villagers
-Ender Chest
-Return of the old Golden Apple
-Snow is now in creative to be layed on the ground
-Lava Bucket and Water Bucket can be placed and shot out of dispensers
-Pyramids can be found in the desert above the ground and buried as well. There are treasures under the blue wool in the pyramids. (Don't stand on the pressure plate)
-Stars look more realistic
-Gravel texture has changed
-Sandstone Stairs
-NPC Villages now are different depending on the biome in which they are generated

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This video will show you -
How to make an ender chest in Minecraft Snapshot 12w21a
How to trade with a villager in Minecraft Snapshot 12w21a
How to find the treasure in a pyramid in Minecraft Snapshot 12w21a
How to make a golden apple in Minecraft Snapshot 12w21a
How to make lava or water come out of a dispenser in Minecraft Snapshot 12w21a
How to mine emerald ore in Minecraft Snapshot 12w21a
How to use emeralds in Minecraft Snapshot 12w21a

tags - "minecraft snapshot 12w21a" minecraft snapshot 12w21a "minecraft snapshot" "minecraft 12w21a" "minecraft snapshot update" yt:quality=high snap shot ender chest "ender chest" emeralds "minecraft currency" "villager trading" "minecraft trading" pyramids "blue wool" tresure "pyramid treasure" "stackable buckets" "new golden apple" "how to make ender chest" "how to make golden apple" "snapshot review" "minecraft 1.3 update" mojang notch "new gravel texture" npc village desert stack buckets