Of course, Levin would never tell his method to beat the enemy. He would never make a rookie mistake by acting almighty and starting to tell the enemy his secret before he killed them all. Also, Levin didn't think that what he did was really impressive. No, he managed to corner the two brothers because they didn't know his ability, and they were too inexperienced to be calm in this situation.
As for what Levin did… Well, he just created a subtle illusion, fooling his enemy's perspective a little bit, making them believe that he was in one spot when in reality, he was just one foot or two away from there. It wasn't that much, and even the illusionist inside his head scoffed at the crude way he used this ability. However, this was exactly the perfect way for Levin to utilize the illusion.