Miner: One of the villagers.

Basic Infantry Unit: Wolves - Essentially crawlers, but each time they get hit, their attack speed increases.

Ranged Unit: Skeleton Archer - Same health and move speed as a normal archer, but armored.

First Magic Unit: Witch - Tis a ranged unit, has the poison potion ability, as well as a fireball ability (that shoots a fireball, not explodes) and a flame wall. She also has a healing ability like the monk.

Second Magic Unit: Wither - Has the normal fireball attack, as well as "Spawn Wither Skeletons" which spawns two small melee skeletons, which cost 1 population each.

Advanced Infantry Unit: Zombie - Poisons enemies on hit, speed of a mage, same health and armor as a juggerknight.

Other Advanced Infantry Unit: Creeper - It's a bomber with slower speeds but more health and does more damage (but explosion isn't as large)

Advanced Ranged Unit: Spider Jockey - Skeleton riding a spider. Fast unit, as well as armored with a lot of health. Standard range.

"Giant": Ender Dragon - This unit is a flying unit, it's also ranged and shoots fireballs (small explosion, less damage than a boulder). But, it's so large, ground units can hit it.
OR
Smile - Large slime, lot of hp, not a lot of damage. He has a melee attack that stuns one unit and when killed, he splits into 2 more smaller slimes. When they die, they split into two more slimes, and when they die, they die. Each time, health decreases as well as damage.

l-o-l.

Wow. Cool :D
Good luck getting this into the game though. :P

No hope of getting this into the game because this is overpowered and needs lots of work to make this third race.

What about the unfortunate people who:
a. Don't play minecraft
b. HATE Minecraft
c.never heard of it
d.some/all of the above
Oh, we'll I'm not exactly sure, but wouldn't this be copyright or something like that?

You people should all have realized this:
This was a joke.