Scratch

This Scratch is the blue one. It came out of the 2017 Halloween Box and is a reskin of the red Scratch from 2016, with the two forming the Scratch Set. The box was open only during the 2017 Halloween Event, so the knife changed to a trading-only item once the event closed.

Same name, different year

Both knives are named Scratch, so the year in brackets is the only label that separates them. The page for this one is Scratch (2017), and the older red version is Scratch (2016). If a trade lists just Scratch, ask which color is meant.

Appearance

The knife is pitch black with a navy blue guard and four blue scratches across the blade, which gives the name. The older knife swaps navy for blood red and blue scratches for red ones, so the reskin is a straight color change on the same idea.

Box data

The curated data puts it in the Legendary slot of the 2017 Halloween Box at 5% and lists the price as 100 Candies per opening. It dates the 2017 Halloween Event from October 27 to November 14, 2017. The knife's wiki page itself states only that it was unboxed from that box.