The Breach

, sometimes also referred to as The Rift, or by, is a tear located atop the  one the Hub Island. It was created during the Calamity. It is tightly connected to the Rift Dimension.

Story
After Jythar used the Fel Magic, has appeared on the place he was trapped. The Breach was latter studied by many, including Dr. Emmett, who was accidentally trapped in the Rift Dimension, because of it. It causes time distortion nearby, that's why the Wizard Portal was built closer to the, because The Fairy's aura stabilizes the distortion. Arba, Arbadak and Mazakala theorize how could be used for Time Travel, which is true to some extend as The Watcher uses it to send visions to his younger self for his younger self to become him.

Trivia

 * , and  seem to talk about The Breach.