Collapses ceiling

And it was also why she hadn’t thought through the consequences of unleashing that much elemental destruction in a large but ultimately enclosed area.
Ascher had talent, but she hadn’t had the training, the practice, or the mind-set she needed to beat a pro.
“I’m scared,” I told her. “I’m scared for you. You’ve had a bad road, Hannah, and I’m sorry as hell it’s happened to you. Please, just walk. Please.”
Her eyes narrowed, her face reddened, and she said, words clipped, “Condescending bastard. Save your pity for yourself.”
And then with a cry she sent another lance of Hellfire at me, redoubled in strength.
Again, I caught it with a conjured cyclone infused with soulfire, though the effort was even more tremendous. Again I sent it spiraling up toward the ceiling—but this time I sent it all to one spot.
Even before the last of the Hellfire had smashed into the ceiling, I dropped to one knee, lifted my staff, and extended the strongest shield I could project, putting it between me and Ascher. It was a calculated bit of distraction on my part, giving her something she wasn’t psychologically equipped to ignore.
She screamed at me, her eyes furious, gathering more fire in her hands, seeing only a passive target, weakened and fallen to one knee, one she could smash to bits with a third and final strike—but I saw Lasciel’s glowing eyes widen in sudden dismay and understanding as the Fallen reached her own comprehension of consequences a few portions of a second too late to do any good.
An instant later, several hundred tons of molten and red-hot rock, chewed from the earth above us by Ascher’s own Hellfire-infused strike, came crashing down on top of her.
The noise was terrible. The destruction was appalling. Glowing hot stones bounced from my shield and then began to pile up against it, pushing at me and physically forcing me back across the ground. The pileup shoved me a good twenty feet across the amphitheater floor, with Michael hobbling frantically along a couple of feet ahead of me, crouching to take advantage of the protection of my shield.
After a few seconds, the falling stone became less violent and random, and I dropped my shield with a gasp of effort. I stayed right where I was, down on one knee, and bent forward at the waist, struggling to catch my breath, exhausted from the efforts of the past few moments. The vault was spinning around and around, too. When had it started doing that?
The air had gone thick with dust and heat and the smell of brimstone. Half of the freaking amphitheater had been buried by fallen stone. One of the enormous statues was covered to the thighs.
And Hannah Ascher and Lasciel were gone.
A few last stones fell, clattering over the mess, bouncing. I noted, dimly, that their arches didn’t look the way they should have. Gravity was indeed something heavier here than in the physical world. It was so heavy, in fact, that I thought I might just close my eyes and stay on the floor.

Skin Game Chapter 46, Page 387-389