Aatrox was sealed inside a sword for tens of thousands of years, stripped of his five senses and left with nothing but endless darkness and emptiness.
One day, a minor villain who was a side character in the original story picked up the sword, and Aatrox possessed him.
The freed evil spirit swore revenge on everyone, making them pay, whoever they might be.
"I am not your enemy. I am the enemy of this world!"
"Remember the screams of your people. They will accompany you as you fall at my feet!"
"From now until the end of time, I will kill you again and again!"
"I will crush your divinity, hollow out your mind, and trample even your memories!"