In the story, the "veil" refers to a mystical phenomenon that separates different realms and dimensions from each other. It's a barrier that prevents easy travel or communication between these separate planes of existence. The veil can be metaphorically seen as a thin curtain that separates one reality from another, making it difficult for beings from different realms to interact or cross over.
Throughout the story, the characters discover that certain artifacts or abilities can manipulate the veil, allowing them to bridge the gap between realms temporarily. This is how they are able to travel to different dimensions, communicate with beings from other realms, and gain insights into the histories and destinies of various realms.
The concept of the veil adds a layer of mystery and depth to the story, as the characters grapple with the challenges of navigating between different dimensions while also uncovering the hidden connections that bind these realms together.