You light up your candle.
With the combined light of torch and candle you managed to see that the creature is nothing more than a whip of shadow.
While it seems to live, it only twiches away from your light.
You step forward, driving it back into a corner and smaller and smaller until it vanishes with a pop.
Lights come on, blinding you for several moments.
A booming voice bellows: 1/3

next! to the east!