He's dying from cancer - another side effect of exposure to the tears - and he wants her to be his heir. Comstock names her Elizabeth, the 'Seed of the Prophet', and keeps her locked away in the tower, protected by Songbird. Your traits dissipate, until they become unrecognizable, or cease to exist."Ĭomstock is unable to have a daughter of his own, so he plots to take Booker's with help from the Luteces. "A theory: just as sexual reproduction can de-emphasise the traits of each parent, so goes the effect of multiple realities on our own. "He seems to have been made sterile by simple exposure to our contraption," she says. It's revealed in a Voxophone recorded by Rosalind Lutece ('On the entropy of genes') that continued exposure to tears has rendered Comstock infertile. This 'sea of doors' (the title of the final chapter) may be a physical space, or a metaphysical one: an illusion created by Elizabeth to help Booker understand her new powers.
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Elizabeth's powers allow her to traverse these worlds, and the lighthouses are gateways to them. In BioShock Infinite's universe, the many-worlds interpretation of quantum mechanics is considered reality: the idea that all possible alternative futures and histories exist. Sometimes something's different, yet the same." There's always a lighthouse, there's always a man, there's always a city. "They're doors," she explains to Booker in the ending. The lighthouses are a visual representation - or perhaps a physical manifestation, depending on how you choose to interpret it - of Elizabeth's ability to travel between infinite worlds, unlocked when the Siphon is destroyed. What's the significance of the lighthouses? Booker is pulled into their universe and given a mission: find Elizabeth and take her away from Columbia, thus preventing a future in which she accepts Comstock's philosophy and becomes a tyrant. But realising that Comstock's prophecy - "The Seed of the Prophet shall sit the throne and drown in flame the mountains of man" - would come true, they turned against him. They devised the plan to take Booker's daughter through another reality, under the pretence that he was 'selling' her to wipe away his gambling debts.
![bioshock infinite elizabeth bioshock infinite elizabeth](https://vignette1.wikia.nocookie.net/bioshock/images/0/07/Elizabeth-C.png)
Initially, the Luteces were working for Comstock. Together, they're incredibly powerful, and able to travel between universes freely. During her experiments she met a male version of herself from another universe, Robert, whom she refers to as her 'brother'. She was a physicist, and developed the technology that allows Columbia to float. "What separates us now but a single chromosome?" asks Rosalind in a Voxophone found in Emporia. The Lutece twins are, in fact, the same person.