A few seconds later, a deep, almighty crack resounded through the church. Valentine turned around and, through the curling smoke, saw that the section of wall had been demolished, leaving a ten-foot-by-ten-foot hole. Additionally, several of the church's stained-glass windows had shattered from the shockwave.
Valentine grinned. "Knew that gunpowder would come in handy." He said cheerfully to himself, unsheathing his sword. He watched as guards began to run towards him, and his expression hardened. "Whatever you're doing, Alexander, do it quick..."
(Sorry. Couldn't resist. Also, Valentine seems like the type to keep some gunpowder in his bag, no?)