I knew, even as I hung limply in Aunt Tabitha’s grasp, that this would be the end of me. I had pushed the magic much farther than I thought I could, but it was done. If I tried to pour that much of myself into the slug, it would be with the energy that kept my heart beating and my lungs moving. I could send it oozing across the battlefield and blow it up, but that would be the last thing I did.