Laz had no idea who this person was, but they were strong, just not as strong as people thought. Laz wasn't fighting for keeps as if he did, he could have killed everyone with a single blow. Ever since he had 'received' so much energy from the goddesses in the palace including the queen herself, his body had been evolving, changing. So much so, in fact, that even he didn't have a grasp on how strong he was.
Think of it like pushing a heavy shopping cart. You can limit your strength by how fast your pushing it. Just getting it to go requires only so much. Push harder and you can go faster, but still have control. But have you ever pushed a full shopping cart as fast as you could? Usually not unless you're some kind of mad man. Doing so would eventually lead to you being unable to control it which could cause a huge problem.
