That much is true. The gun is expensive. It uses a crystal to fuel and fire its shots meaning it would last longer than a gun that needs powder would. However, that doesn't mean its energy was at all infinite. And Drake was using it up pretty quickly. She clicked her tongue as she began to come to terms with that.

"Then I'd be just about ready to sink, but I think we're still well away from that. I've still got a few tricks left."

Immediately stopping, Drake delivers a kick at the sand on the ground. Should things go as planned, the sand would be shot high enough to strike Arturia in the eyes. Anything to avoid a direct confrontation... However, there was a risk. Now that Drake paused, she would be left open for an attack. Yet again, she banks on a decisive shot to hit Arturia on her arms and legs. A knight that can't move or hold her sword is useless.