There's gotta be some perks to being a fallen angel, maybe. He shouldn't be good at this, but he does have a very high intuition.

He gives Istredd a mental flick.

Because.

No.

Nope.

Let's be perfectly clear.

Oh, no. No, no, no, I'm still very concerned. You are currently nowhere close to being shattered. You can't go be reckless and actually get your mind exploded, Istredd. I can fix cracks, I can't fix hundreds of shards. The room in Hayle? No fixing that. Shattered mind? And then he actually flicks the side of Istredd's head with a hand. "Don't let it happen."