Largely, only what you've told me— though some from observation.

[Cyrus doesn't rise to Therion's glare, remaining calm and collected. Given the nature of Darius' betrayal, Cyrus thinks it beyond understandable that Therion considers this a sensitive topic.]

I was with you when you confronted him. He's not the subtle sort, at least not anymore.

[Darius was the sort who loved the sound of his own voice, in Cyrus' opinion. He'd done an awful lot of monologuing.]