Collects X-Men: Legacy (2012) #19-24. It's the climactic story this series has been building to, guest-starring the allies Legion has made along the way…and not all of them will emerge unscathed! One of Legion's most troublesome personalities threatens to annihilate an alien species, and S. W. O. R. D. director Abigail Brand is on the case - but will she be able to work with David to solve this extraterrestrial conundrum? Legion prepares for a final showdown with the monster in his mind that wears his deceased father's face…but the demonic Professor X has escaped into the real world. What price will Legion pay to stop him from razing the Earth? And, prophesied to stop Legion, will Young X-Man Blindfold take matters into her own hands and extinguish her first love? One thing's for sure: as this groundbreaking series concludes, anything is possible!