The mobs in this post have not yet been added to the game but will be in further updates. Everything here has been confirmed. If you would like to see what is going to be in the updates, Click Read More. If you dont want to see spoilers then dont read, Thank You and enjoy :).

Magma Cube:
Magma Cubes are hostile mobs found around The Nether. They will be released in Minecraft Beta 1.9. When killed, they release 2-4 smaller versions of themselves in addition to Experience Orbs, slightly unlike Slimes, which split into 4. When they move, they jump up and momentarily unravel into several layers, giving them the appearance of a spring and revealing a molten lava core inside. They are slowed by and sink in lava, but do not drown in it. In their passive state, Magma Cubes move slowly, jumping forward every two seconds or so. Upon spotting a player, magma cubes will jump towards them more quickly, but they are still easily outrun. Unlike most aggressive mobs, Magma Cubes do not damage you on contact. They can push the player harmlessly. Instead, they will try to damage you by jumping directly on top of you. When they land, they create fire which can damage you. However, they cannot damage other mobs like this. Heath when big is 20, Small 3, Tiny 1. Attk when big 3, Small 2, Tiny 1. Spawn in the nether, Drops Nothing.

Snow Golem:
A Snow Golem (previously and colloquially known as a Snowman) is an upcoming mob which was first mentioned by Notch on September 21, 2011 to appear in Beta 1.9. The Snow Golem is the game’s first ”utility mob”, defined by Notch as any player created mob. You will be able to create Snow Golems, using Pumpkins and Snow Blocks. Snow Golems will throw snowballs at enemy mobs and will melt in warmer Biomes. In cold biomes, they will not melt even when lava is near them, unless they fall in it. As Snow Golems move, they leave a trail of snow on the ground (but not in deserts or in the Nether). Once killed, the Snow Golem will drop 1 to 15 snowballs. To create a Snow Golem, the player must vertically stack two Snow Blocks on the ground, then place a Pumpkin on top of it. They are not made on the Crafting Table. They are only created when the pumpkin is placed last. Pistons cannot create Snow Golems because they cannot push pumpkin blocks. Snow Golems can also be created using a Jack-O- Lantern, although there is no visual difference. Endermen are also capable of creating Snow Golems by placing the necessary blocks, although it is extremely rare. Heath points 2, Attk 0, Drops 1 15 Snowballs.

Blaze
Blaze (a.k.a. Nether Guard, Guardian) is a type of mob found in The Nether. In their searching state they are confined to the ground and do not blow smoke. They will not start flying unless they spot the player. When pursuing, they catch fire for a short while before making their attack in the form of a three round burst of fireballs. After the attack they have a short cool down and then they will catch fire and attack again. Their bodies are made up of a head atop a central column of smoke, and three rotating sections, each rotating section contains four floating yellow rods. They drop Blaze Rods, and can only spawn in Nether fortresses, often from Mob Spawners. The triple fireballs they shoot set players and mobs alike on fire. Despite appearing exactly like a Ghast fireball, Blaze Fireballs are not explosive, and cannot be deflected. Blazes are one of the most difficult mobs to fight, due to their ranged, unblockable attacks and rapid rate of fire. Heath 8, Attk Easy 1, Normal 1 1/2, Hard 2, Spawn Nether, Drops 0-1 Blaze Rod.

Enderdragon:
The Enderdragon is an upcoming mob that is planned to be in the 1.9 update. It exists only in its native dimension, The End. This mob will use the Dragon model Notch created, but it will be black and scaly with purple eyes compared to a normal dragon. Like other dragons, the Enderdragon will have 6 limbs; consisting of 2 wings, 2 legs and 2 arms. Jeb has made it clear that Notch plans to make the Enderdragon very difficult to fight without “enhancements.” The Enderdragon can destroy every block (even bedrock) except White Stone and Obsidian, which they pass through harmlessly. Nothing else is known about it at this time, other than the fact that it is one of the few creatures that inhabit The End. Heath 1x100 (Invulnerable), Spawn The End.
If i forgot or am missing anything that should be in this post feel free to sned me a message by clicking “Ask Me Anything” on the homepage. If i did miss anything it will be posted anyway when the full update of 1.9 comes out. Have a great day, And dont forget to check back when 1.9 is released. As always, I would like to know what your thoughts are on these updates. (?)