Blindness dust as a physical effect/spell?

A cloud of dust fills the room. You yell 'Help! Assassin just threw dust in my eyes!' You are blinded! Your cut misses someone. Someone dodges your cut. Someone parries your cut. The booming call of an ostrich fills your ears. You have 0 weapon specializations. You are specialized in dagger. You are specialized in spears and staffs. You are affected by: Physical effect: 'blindness' modifies hit roll by -4 for 1 hours. Physical effect: 'flight' for -1 hours. <631hp 521m 172mv 9776tnl (civilized)> The edges of someone's being stretch and twist and it returns to normal. <631hp 521m 172mv 9776tnl (civilized)> st You stand up. <631hp 521m 172mv 9776tnl (civilized)> Someone utters the words, 'qaiqzrrahuai'. The magic of your blindness spell unravels.