“For someone with a heart of stone, yours is certainly soft these days.”

In Chapter 12, Lucien foreshadows the answer to Amarantha’s final task for Feyre at the end of the book. Lucien intentionally uses a double entendre when speaking to Tamlin in this scene. He playfully implies that Tamlin is usually emotionally unavailable and maybe even incapable of love. The irony of his statement is not obvious to Feyre until the very last chapter of the novel when she realizes that Tamlin’s heart is literally made of stone as part of Amarantha’s curse. Tamlin’s stone heart is also metaphorical. He’s spent forty-nine years unable to break the curse and fall in love. The task Amarantha sets for him, to love and be loved by a human who hates faeries, is intended to be impossible when Tamlin has a metaphorical heart of stone. Lucien says this to Tamlin strategically because he knows that Feyre is eavesdropping. The statement lays the groundwork for Feyre’s realization that Tamlin has a literal, not symbolic, heart of stone, allowing her to save Tamlin’s life and all of Prythian in the process.