vs tree trunks

I couldn’t get over how easy it was to use magic in the boiling air. I’d already performed several spells that by all rights should have left me in need of a breather and a meal. Instead, the latent magic in the air made me feel exhilarated, eager to do more. Which isn’t different from any other kind of power, I suppose. And it held the same dangers. So I was careful about how much force I used on the trees. Just enough to rip through each trunk and send them crashing down toward the street below.

Battle Ground Chapter 25, Page 227