I was trying to concentrate as hard as I could, ignoring the imminent crisis my team was in. The staff was a great help to me in concentrating my magical energy, which I assumed was double of my normal efficiency back in my days as a magician.
However I didn't know if this was enough. I didn't plan to just defend these shock waves, I had to step forward. That demon had to be hit as hard as I could master out of my skill, supposing that I succeeded in casting the skill right.
Once I started using my spell, I couldn't augment it anymore. That was one of the drawbacks of it, which made it not my preferable spell back then. And now this came to remind me why I hated this spell.
So I waited, as much as I could. The only consolation for me was my team safety was secured. As long as these shock waves continued, no harm would come to them from the believers.