After he finished his experiements, Billy went to rest for one hour as well. He could continue what he was doing while they explore the next floor since the others magic detection skills sucked.
"What should we do about the enemies now?" Icarus asked. "They will appear in the front and behind us, right?"
"As long as they didn't suddenly emerge, we will be fine," Meryl said. "The real issue here is that we will be moving away from the enemies after attacking them, so recovering the projectiles will be difficult."
"That won't be a problem to me," Billy said.