This could link to a sub-plot. Where a Scientist is running from you, and he has 689, and as you wonder around the facility, you may see him running, and if you chase him to a Tesla gate or something, he will die and you can pick up 689 as a killer, but 714 is advised. Then you can use it against Mtfs, but something non-canon can happen, like when tentacles appear in 035's room. But after about 10 kills the item will be unusable for time and will go black, and trying to use it will burn you and cause bleeding, but can be used again after 5 mins or 10 mins.
Plus, it means new emoticons!
![SCP-513 :513:](./images/smilies/o0ljcPZ.png)