The Time Lords became aware of their future involvement in the Time War a long time before it began, and many prophecies, stories and legends were generated around the idea. One concerned the Hybrid, which some took to believe would be a creature, half-Time-Lord and half-Dalek, capable either of Gallifrey's salvation or destruction. Many years later, after the war, the Twelfth Doctor would claim that the Hybrid was destined to conquer Gallifrey and stand in its ruins. (TV: Heaven Sent)