Fantasy: One hundred billion clones are on AFK, I am invincible

Su Zhan traveled to the fantasy world and was accidentally abducted by a strong man to a mine, becoming a low-level miner.
Until the black mark on the palm absorbed three low-grade spirit stones, a black shadow clone exactly like Su Zhan was born!
The black shadow clone can obey all orders. Not only can it mine for Su Zhan 24 hours a day, but it can also kill people and rob goods, and even help Su Zhan practice breakthroughs, practice skills, refine pills and tools, etc.!
"Practice? I have 10,000 clones to help me practice, and even the most powerful genius can be easily crushed!"
"God-level skills? I have a million clones to help me practice, and I can learn it in three days and reach perfection in a month!"
"Can the strong kill me? I have hundreds of millions of clones attacking day and night, and I can kill you!"
...
In this way, Su Zhan alone made the entire fantasy world silent!