Stone Cold Heart is an achievement/trophy in The Knife of Dunwall.

How to Acquire

During the mission Eminent Domain, Daud travels to the Legal District to eliminate a corrupt barrister named Arnold Timsh. A side room on the fourth floor of Timsh's Estate contains a statue of Delilah Copperspoon. Daud can choose to speak to it, and the statue will respond. When her monologue ends, the achievement will unlock. Void Gaze is extremely useful for locating the statue as it appears yellow, the same as other NPCs throughout Dishonored.