This is the story of a crazy lich who possesses an internal game system and brings catastrophe to the entire world. “Let’s look at the daily quests today… it’s the damned choose one-of-two-options-type again. Destroy a town with a population of 30,000 people or above; reward: 10,000 evil points. Steal lollipops from 3 children; reward: 1 evil point. If neither of the quests is completed, then 2 points will be deducted.” “Tsk! You think I’m stupid? If I really destroyed a town, a crusade of Myth-ranked Holy Knights would definitely come hunting me down. Even if I earned the points, there wouldn’t be any life left in me to spend them. I better just go be a kindly lollipop bandit.” I’ve already had enough of being a notorious lich. Who says a lich can’t be a good person? I’m definitely going to beat this damned system and be an upright and dignified good man.
The more primitive the battle, the simpler and more violent it would be. Battles purely for the sake of survival or revenge would always be the cruelest and bloodiest. These battles would be far simpler and more direct compared to barbarians' fights against wild beasts. The primitive rules of blood revenge dictated that cruel battles between barbarian tribes would have no innocents surviving.
Yet, in modern warfare of my original world, battles actually had both international rules and unstated rules, such as normal scale warfare, forbidding the use of large-scale AOE weapons like nuclear bombs, limited-fly zones, international treaties, and so on…