Because of the heavens, Klaus fought many different kinds of people. Many are the unique kinds of people that one just doesn't understand.
He saw the lengths the heavens had to go to bring him down.
One such person was the Ancient Shaman.
Back then, he was pursued by a being that didn't need weapons to kill.
All this person used were short stories that could make you wish he were a weapon wielder.
One fateful day, when Klaus, who was known as Fruity back then, fell into his trap, he spent three days trying to survive many stories.
The Shaman called it the Ancient Story Game.
Three days inside the stories made Klaus understand the horror. He tried everything, but even after three days, he couldn't escape.
That was when he decided to learn the stories and fight back. Thankfully, a paragon does best by learning new things—or, more accurately, stealing from people.
So he learned the Ancient Tongue, and that was when he could escape.