Game mode is Clash and this will be the last opportunity to earn the Shades of Radegast emblem.
Destiny 2’s next big DLC is Curse of Osiris but to keep players busy until then, it will see Iron Banner returning on November 21st, 1 AM PST. The event will run for a week and formally ends on November 28th, 1 AM PST. The game mode will be Clash this time around and will mark the first time that PC players get to participate.
In order to play Iron Banner, you need to finish the base campaign, reach the Tower and receive the Iron Banner quest from Lord Saladin (ignore the fact that he doesn’t recognize you or acknowledge the events of Destiny: Rise of Iron). Earning loot will require reputation tokens from playing Iron Banner Crucible matches. Completing challenges will grant more tokens for new armour sets and weapons.
Bungie also noted that the next time Iron Banner returns, it would be season 2 of Destiny 2. There will be new rewards to earn along with “new ways to earn them.” So if you haven’t earned the Shades of Radegast emblem yet, now’s the time to complete that Seasonal Milestone.