The first time I met Apocalypse was back when the Professor had been shot by Stryfe and Scott and Jean kidnapped by Sinister. We had just battled the Mutant Liberation Front, and were figuring out what to do next; and then he just showed up at our doorstep.
Bobby, Peter, Warren, and I were the first ones to confront him. Of course, I had seen his file, and knew what he had done to Warren: converting the high flying Angel into the Archangel of Death, his fourth horseman. I have known Warren for years, and never had I been so shocked and scared of him as that night when he simply transformed into a blood-thirsty man.
Apocalypse called Warren "his son", and he seemed pleased to see how his greatest creation had become a predator in the blink of an eye. But he didn't show up at the mansion to fight; En Sabah Nur wanted a truce... a truce to defeat the man who had hurt us and nearly killed him as well: Stryfe.
I remember feeling sorry for Warren. He had been turned into a shadow of his old self against his will by Apocalypse. He had lost all sense of self, he didnt know who he was anymore; I could sympathize, because many times I had been subject of the same type of body and mind violation.
Little did I know that Apocalypse would come back to haunt me, first as an elemental to power up his ascension, and later to turn me into one of his horsemen.
I feel his dark touch, I feel his power increasing mine... I like it.
For more on Polaris' first encounter with Apocalypse, and the coolest shot of Archangel ever seen, check part 8 of "The X-cutioner's song": X-Force #17