Ok, so this is gonna be quick for now but i wanted to get the idea out there. Targaryens (Skinchangers) must die for their spirit to go into the dragon eggs. and same chapter later. So the egg for Viserion was already alive by this point. This is right after Rhaego died and Dany gave birth in the tent with the shadows. This is also long after Viserys is dead. Viserion-Visery Rhaegel-Rhaego (named for Rhaegar) Drogon-Drogo Drogo dies shortly later when