Hazel screamed. She’d opened the supply box and almost dropped the two glass vials she was holding.
Leo caught them. Each was the size of an apple, and the liquid inside glowed poisonous green. The glass was warm to the touch. Leo’s chest felt like it might implode from guilt. He’d just distracted Frank and possibly gotten him killed, but he couldn’t think about it. He had to save the ship.
“Come on!” He handed Hazel one of the vials. “We can kill the monster—and save Frank!”
He hoped he wasn’t lying. Getting to the port rail was more like rock climbing than walking, but finally they made it.
“What is this stuff?” Hazel gasped, cradling her glass vial.
“Greek fire!”
Her eyes widened. “Are you crazy? If these break, we’ll burn the whole ship!”

The Mark of Athena, Chapter XXIII