Altering Fate: what happens if the storyline is changed

Everyone loves a classic cliché right? I did, now I am not sure. CRASH!!! That sound was of a truck ramming into me. I was reborn, obviously in a dangerous world. I will beat those who stand against me and become the most powerful figure. MHA, get ready for a twist. A new character is born. A troubled teenager is reborn with a knack for ruthless survival and a thirst for power. With a system to help her and a creative mind, will she bring the world crashing down? How will she become stronger and will the denounced useless system help? NOTE: Hi everyone, this is my first fanfic I hope you enjoy and connect with the original plot from time to time.