The Endless Delve event will start on December 11th and the event will last for one week. In this one-week event, you'll play exclusively in the Azurite Mine and won't need sulphite for progress.
Before the Endless Delve event started, GGG released some frequently asked questions about this event.
We will start at level 1 with 40 wisdom scrolls, your normal class skill and support gem on the Twilight Strand, a pair of small life flasks, a small mana flask, and five unique starter items.
Marauder, Templar, Witch, Shadow, Ranger, Duelist, and Scion will receive unique starting items. In the event, the Altar of Ascendancy is available in the Mine Encampment.
How do I join the event?
At the character selection screen, there's a panel below your characters that will list the events available. You can join the event by clicking join'. This option becomes available 30 minutes before the event is set to begin. Your character won't be able to move until the event starts.
Before starting the game, we need to prepare a large amount of poe currency to strengthen our equipment and gems, etc. so that we can gain a greater advantage in new activities, you can buy poe currency online.
More questions: https://www.pathofexile.com/forum/view-thread/3001224