reacts to spell

“The shrines!” I shouted to the Lecters. “Manifest and destroy them!”
I brought my shield up again, an instant before Corpsetaker sent a slew of dark, gelatinous energy up the stairs. I caught the spell in time, but it instantly began wrenching at my shield as if it had been some kind of living being, chewing away at it, devouring the energy I was using to hold the shield firm.


Ghost Story Chapter 45, page 471