empty left
You throw a black cube to the ground and close your eyes so that the effect of the gas released does
not affect you. Feeling around, you find an exit and slip away hopefully unnoticed.

elanthipedia

Thieves can drop and will disappear to an adjacent room in a cloud of smoke, and be hidden. Other guilds will cough on the smoke and incur a slight roundtime without the cube being used up.

Any idea what stats or skills these cubes contest?