It was nature, really. Creatures understood self-sacrifice even in survival of the fittest. That's why some creatures like lizards had developed ways of leaving parts of their tail behind to trick predators. The blood-letting, however, was a bit more of an extreme tactic.

"Okay, then that's our first goal." Ilia pulled her arms to her sides, fists forward and her legs apart; a typical stance in martial arts. "The trick to a good punch, Lana, is focus. Focus above all else."

She moved slowly, going through the motions of a straight, right punch. Then she slowly pulled back into the previous stance and punched again, this time with the left. "You put your whole body into it, and get an idea in your mind that you are going to smash bones and cause injury. If you can't follow through..." The left the rest unsaid.

Ilia motioned for Lana to take up the same stance as herself. "Try it."