Mission objectives: Take a drone to the Khaydarin Crystal Formation.
In this mission it is vitally important that you do NOT try and destroy all the protoss bases. The first thing that you should do is build good defense but one that does not take to much time. Make Overlords that are able to be transports and some Srounges and Queens. Build up a force of twenty four Zerglings, Hydralisks, and Scourge. Go right from your base until you are able to go down and not hit a wall when you can know that their is a protoss base down there. When you attack this base use your Zerglings as the first wave of attack, while they're attacking use your Hydralisks to do the real damage the Scourge are basically Carrier killers, if you see one tell all of your Scourge to attack. Once the path to the Crystal is clear send your drone down escorted by some units. Once your Drone gets to the Crystal it starts a ten minute countdown. You will need to keep moving new forces in to hold the area. Gaurdians are especially helpful but make sure that you have something that can shoot air as well. If you succesfully hold the area for ten minutes you will win the mission.
