Causal: Nexus

The concept is widely explored in fiction and philosophy as a way to understand our interconnected reality.

Elias spent his life following the equations in the notebook. He built the Chronos Engine, a device capable of piercing the veil of the multiverse. But as the engine roared to life, the Library began to burn. The friction of the time-fissure ignited the ancient scrolls. Causal Nexus

Elias stood in the ruins of the Great Library, clutching a charred leather notebook. He was a "Time-Sensitive," capable of feeling the hum of a —a point where time tracks diverged and collided. The concept is widely explored in fiction and

He didn't have a choice. To ensure he grew up to build the machine that would bring him here, he had to give the boy the book. He had to be the spark that started the fire. But as the engine roared to life, the Library began to burn

"The world ends in fire," he whispered to his younger self. "Unless you build the Machine." Perspectives on Causal Nexus

In a panic, Elias realized the "fire" the man spoke of was the very act of building the machine. He grabbed the notebook and stepped through the shimmering portal.

“Wally learns the hard way that good intentions don't off set the consequence of time travel... Wally's actions have already set off a chain of events that can't be stopped.” Fanfiction.net