"Let's just say everyone who is Troubled? Their blood is... different." Duke's own Trouble makes him more susceptible to all that Troubled blood, and it means his blood is more overflowing with aether than the rest especially after Mara had her way with him.

He closes his eyes, breathing out. "So let's see examples... being able to make people spontaneously combust, controlling the weather, making taxidermy come back to life, being able to make people do whatever you say, crying and making people die every time you do. Y'know, the usual cursed stuff."