This 4v4 Crucible mode replaces the original Destiny's Tria Of Osiris and is only available on weekends for 72 hours - from 10 a.m. PT on Fridays until the same time on Mondays . Before you can play this feature though you must have completed the main campaign, completed Call To Arms Crucible Milestone once, and have a minimum character Power Level of 260.
In Trials Of The Nine two teams of four face against each other on a singular map that rotates weekly where the objective is to be the last team standing. Players enter this match with a premade fireteam of four and once the activity starts the player's inventory becomes locked until the match has finished. In this elimination mode where the teams attempt to win nine matches before they lose three, there are no respawns or limited revives. If you want to continue playing after the game has completed you will need to reset your card.