User blog comment:Filheinz/What has Yorick done?/@comment-8324295-20130704173243

Riot stated that 'Twice, if I have to' doesn't necessarily mean a gameplay mechanic, more like a lore thing. I think the best nemesis for him is Mr Kaiser, because the girl in his lore, who may have told the story to others, but nothing is said about what happened to her later. Also, it's said that he is the first undead, meaning he is propably present for a really long time now, he could be someone who survived Lucian's guns, and took revenge on him by killing his lover.

This is the best of the propable connections i can think of right now, so i hope my guess is right.