launches bones

I grabbed my staff and ran to Gard. The malks hadn't noticed her yet. They were still busy mobbing the grendelkin—
Crap. My concentration had wavered. It looked like itself again, as did I.
I whirled and focused my will upon the giant pile of clean-picked bones. I extended my staff and snarled, "Counterspell this. Forzare!"
Hundreds of pounds of sharp white bone flung themselves at the grendelkin and the malks alike. I threw the bones hard, harder than the grendelkin had thrown his rock, and the bone shards ripped into them like the blast of an enormous shotgun.

Side Jobs, Heorot, Page 144-145