[b]A "poof" sound happens when shisui gets surrounded by a cloud of smoke. It quickly blows away, and all that is left is a wooden log with the tag on it on the ground.[/b] "That's my substitution jutsu!" [b]You hear from behind[/b]. "Don't charge recklessly into me, because I could be a fake!" [b]I charge at you from behind[/b] [spoiler]That jutsu's weakness is seeing heat signatures, for example that Shisui you saw before you did your move wouldn't have had a heat signature. Also, it can only be used four times in battle.[/spoiler]