Unicorn Mask

The whole outfit falls out of Goodie Bags, and those only drop while the Halloween season is running. The season reads the calendar on your machine rather than anything you have done in the world, so if the date has gone past you either wait a year or move your system clock.

A bag holds one costume item, so expect the shirt or the pants to turn up several times before the mask does. Kills are the only input, which makes a Blood Moon or an invasion landing inside the window worth far more than an evening of surface wandering.

All three pieces go in the social slots, so the horn and the pastel coloring sit on top of whatever armor is doing the real work. Dyes apply per slot here, so you can recolor the mane and leave the rest alone.