BLINDNESS DUST

'BLINDNESS DUST'
Syntax: blindness dust

Ninjas have been known hide small packs of dusts in their garment with which 
they can blind their opponents.  Ninjas would fill the whole room with the 
smoke from these dusts, causing everyone else in the room to be affected by 
the dusts.  These dusts are very potent and may blind a person for hours.