Shadow Lord: Start with a Billion Shadow Troops!

[High martial arts + systematic invincibility + decisive killing + black shadow army + one man army + never future troubles] Three years ago, Su Mu traveled through time and became a student at Wuhan High School, but faced the double desperation of her parents missing and her admission quota being taken away. When the son of the vice-principal joined forces with the school to slander him and expel him, the World Extraction System was finally activated. During the first extraction, he got the Sombra mask from "The Adventures of Jackie Chan". "Can I summon the Black Shadow Corps? And... Every time I kill a creature, I get one more soldier?" Since then, the style of Gaowu World has completely changed. While others were practicing martial arts hard, Su Mu sneaked into the wilderness and whispered to the ant nest: "The killing begins." Within a day, one hundred thousand shadow troops knelt quietly in the shadow behind him. When the enemies who framed him toasted to avoid future troubles, they threw him into the mortal vanguard camp against the alien beasts. They thought this was the end of the story. Little did they know, this was just the beginning of the rise of the Shadow Lord. On the battlefield of mountains of corpses and seas of blood, the military boss looked at the endless black shadows that were driving back the beasts with one man's power, and asked tremblingly: "Who... Are you?" Su Mu stepped on the enemy's corpse, and the shadows gathered into a throne behind him. "Me?" "Just a guy here to collect a debt." From death squad cannon fodder to imperial general. He developed the abilities of the Black Shadow Corps to the extreme - fusion, evolution, endless. When he came to the city, the entire academy and even the military would tremble for the crimes of that year. "My shadow is the army."