u/Lysqq

(Just ACOTAR spoilers)

I think it's cool to recap:

Broken:

Obviously, the cauldron

The wall

Nesta, Gwyn & Emerie (and the Priestesses): “You were trying to show me. Show others. Who you are, down deep. What haunts you. You were trying to show them all those dark, broken pieces because the priestesses, and Emerie, and I … We’re the same as you.”

Gwyn "I have been broken once before“ "I survived it. And I will not be broken again—not even by this mountain.”, "Gwyn lifted the blade. 'Nothing can break me.'" 

Elaine

The horn

Spring court

Lost:

Dusk court

Swords (Narben)

Bryaxis

Nesta's power

What else can you think of?