"Night Demon" Contender's Costume

"Night Demon" Contender' Costume is sold by Chapman for during the Day of the Dead holiday from November 1-November 3. Equipping this, or one of the other four costumes, grants characters a bonus action button with one of three random abilities:

Use the bonus action button on other characters with the costume equipped to kill them. Defeating other costumed characters is the objective of an achievement series:
 * 1) To The Afterlife
 * 2) Vientos!
 * 3) Calavera

The objective is to defeat one, twenty, or fifty other characters and does not have to be completed during the holiday, as the costumes are permanent and last year round. For an easy method to earn the kill-20 or kill-50 achievements, see the Easy Calavera technique section of the Day of the Dead article.