What happens when Kreacher saves Regulus Black from the cave, and young Auror Sirius Black has to take care of him? WARNING In this story, Regulus is 3 years younger than Sirius. And the Prophecy came in the early of 1980, and Voldemort has been keeping an eye on the Potters and Longbottoms since then. So, Severus Snape turned to Dumbledore in early 1980 as well.