Leo who left after he was done talking with Henrick, that Leo who looked and sounded dominating before, was now breathing heavily under a tree. Though he looked relaxed when facing the enemies, in truth Leo was already pushing Ren's body to its very limits. The techniques he just used were his weakest, some of them weren't even techniques just simple sword slashes, yet it took Ren's body a great deal to do them.
Leo's slashes were done with perfect synchronization with his body, his mind, his spirit, and his mana. Normally in his own body he wouldn't notice that he was doing this everytime he swung his blades, since his body was so strong that it didn't bother him. Yet now that he was using a weaker body that could not handle such movement, his whole body was in extreme pain.