Through the previous tests, we learned that the attack is multiplied by the skill magnification before subtracting the defense, and the skill level will be accompanied by some damage. The impact of this "direct increase and direct decrease" mode is that the income will not decrease, and the heap will become stronger and stronger. In order to play other modes, everyone focuses on heap attacks, which makes the attack defense completely different from the same level. In addition, the defense value itself is also low in terms of equipment (this is also impossible. If the attack and defense 1: 1 appears on the equipment, plus the blood volume, the number of rounds will definitely be prolonged and the game will become boring), so the defense hardly works. It is assumed that everyone will pile up their attributes to the ideal level in the later period, and the defense function is about: it has strong resistance to damage with an attack percentage less than 100%, and the higher the attack percentage, the lower the defense function. In short, it is strong against group attack and weak against single body.