Cannot Embrace
2 point Flaw
Either due to your high generation or because of some other factor, you cannot pass on the Curse of Caine to another. No matter how much of your vitae you feed to a freshly drained mortal, she does not rise as one of the undying. It's altogether possible for a character not to know that she can't Embrace until the moment of truth, when a potential childe lies dead at her feet. This Flaw is common among the 12th generation. In fact, until recently, most thought that no 12th-generation vampire could sire. You can still create ghouls and blood oaths as normal.
"Recently" means that sometime during the Renaissance, the Curse of Caine strengthened to the point where it could commonly be extended to the 13th generation."