It’s too dark for you to see anything. There’s some dimlight due to the trogs and kobolds setting some stuff on fire but there’s nothing within view, not even cover. Act fast, before the enemy noticed you’re team! You could try a stealth check to sneak by unnoticed, or perhaps a plain athletics check to run as fast as you can around an hopefully find it manually. Feel free to try any other check if you feel it’s relevant, however you [b]cannot[/b] do another perception Check at this time.