You've taken a strop to your skills and given them a razor's edge
From Fallen London Wiki
"Oh. Oh my. Where on earth did you learn that?"
Raise at least one of your skills to 50 or higher, including modifiers from your equipment.
image is knifetransparent.png, unlock condition is as above, with icons for each main stat and the subtext 'At least one of your skills if 50 or higher.