If you are the one to receive the assassin's blow, you will not surmount all your trials.
To see another, with the assassin standing over him with blood stains, portends that misfortune will come to the dreamer.
To see an assassin under any condition is a warning that losses may befall you through secret enemies.
If you are the one to be struck down by an assassin then you will not experience the realization of your goals. To see someone else who has been killed, with the assassin still there, and blood spattered, shows some very bad luck to the dreamer, as he/she will be brought low by the underhandedness of an enemy.