An  Expulso  came towards Ron, who was oblivious of the spell. Grabbing a connection, I turned it towards the wall. The magical wave that came from the impact caused Ron to stumble. With a rough grab to stable him, I said, "Ron, I need you to focus. We are in the middle of a battle and you need to survive. Focus on that." He looked at me. I sensed another spell coming towards us. My grimoire came out instinctively and went to the page I needed. Pulling the rune from grimoire and placing it at our feet, a shimmering barrier appeared. This time the spell was bounced, heading towards the far wall. Narrowly missing Tonks. 