"Lance you will get a human morph by acquiring all of us and combining the DNA together to make one person. Yeerk that is a word I despise every time I hear it I want to puke. A yeerk is a parasitic alien that crawls into your brain through your ear canal and flattens down on your brain and becomes in total control of your body. When a yeerk has control of you, you control nothing its like watching TV from first person but you know it's your body and your life the only thing you can do is look through the yeerks memories if it lets you. I know what this is like I have been controlled by one before and anybody controlled by a yeerk is called a controller, my brother Tom is a controller and I am fighting to get him back. As far as we know it all of your parents are controllers. My best-friend's mom was a controller but we made sure to free her before he was killed by Visser three the leader of the Earth invasion. The man who also killed two of my other friends using an andalite's body."
