Mech Terror [Mecha Sci-fi]

This story is about a young man named Gray, who was one of many humans on Earth to witness an alien invasion and survive. He not only survived he also fights back, becoming every alien Mech's terror. How does he do it? With the help of stolen alien knowledge and a new type of power known as Bio plasma, with this knowledge he builds Mech’s, space ships and all sorts of weapons for his crew that he assembled to fight with him, though he can’t use a Mech at the moment. That is one of his goals for the future! So, join him on his journey as he fights to save mankind and to avenge his dead mother.