For those who don’t know, Kern’s storyline gets resolved in Star Trek: Online, in which his memory gets restored. (In an ep of DS9, he has his memory wiped and is given a new identity— and is the last time we see him on screen).
Well, his right hand is sawn off, and he has a hook jammed in the bloody stump. And if you look in the mirror... and you say his name five times... he'll appear behind you, breathing down your neck.