This unit and all of zerg units are formed by larva which are squirming around the hive. The drone like the probe and scv is the only unit that can build stuff but zerg doesn't just build the building the zerg becomes the building.

Weapon: spines.

To build ppl u must build overlords aswell. You normally start off with an overlord so u can use it to scout. An overlord can also work as a dectector and a transport aswell, but is very slow.

Weapon: none

Zerglings are savage lil creatures that u get 2 at a time.

Weapon: claws.

A hydralisk is good in a massive group like all the zerg units are.

Weapon: Needle Spines.

The Ultralisk is the most powerful of all the zerg units. If you are against this unit attack it by air.

Weapon: Kaiser blades

The Mutalisk often looks like a giant bat caughing up hair balls but those hair balls hurt. They can attack air and land.

Weapon: Acid Spray

Guardians are made from two mutalisks put together and are really powerful, but they cannot attack anything in the air, so if you're against them approach em by air.

Weapon: Acid Spray

scourge are cheap and you can scout with them. These lil Camekaze bats fly into a flying unit and blows itself up.

Weapon: Plasma metamorphosis

A queen can cast a spell onto a tank or goliath called spawn broodling left which turns them into these two lil creatures. The queen can also put a parasite into another unit which makes it possible for u to look throuh its eyes. Another spell is Ensnare which disapears eventually but slows them down for the time being and last of all is the infestation which the queen can cast on the terran command center which allows u to make infested terran ppl.

An infested marine is very strong and can only be made by an infested command center or u infesting it individually.left is a hero sarah kerrigan who eventually is infested.