Once Sarah made some progress with her magic, she decided to take everyone to the areas where she one the others found her magic tools. Naturally, that wasn't a mission, and since Kate was going with them, they had to tell Edward what they were going to do.
"Are you going to explore the desert for magic items, sure," Edward said. "I am hoping that you can bring some nice magic items."
"You already knew about them?" Billy frowned.
"I wouldn't have devised and attacking plan if we didn't know everything about Sarah's tribe," Edward said. "Their magic tools mostly have miscellaneous use and since before few of us had enough mana to use those, I decided to ignore that fact."
"My apologies for hiding that until now," Sarah said.
"It is fine, they were yours to begin with," Edward said. "We fought for unification, not for conquest."