Well of Eternity
The Well of Eternity is a mystical location within the Warp itself where it is situated at the very centre of reality. Thus, it existed in a place where time and space originated as well as ended. When the Chaos God Tzeentch, the Grand Sorcerer, desired to learn of the future, he travelled to the Well, where he sent his most powerful and trusted Lords of Change though none emerged from the currents within this site. An exasperated Tzeentch thus decided to cast his own vizier, Kairos into the Well of Eternity who miraculously survived and gained knowledge of events in the future.