Before you enter the Shadowfell in BG3, wrap up anything you still want from Act 2 and Moonrise Towers first —because that choice is a major point of no return for several quests and world-state changes.

Best things to do first

  • Finish the Gauntlet of Shar side content you want before committing to the Shadowfell entrance.
  • Rescue the Tieflings and gnomes from Moonrise Towers prison if you haven’t already.
  • Explore Moonrise Towers freely and talk to vendors before progressing too far into the story.
  • Complete Act 2 companion and region quests , especially:
    • Lift the Shadow Curse.
* Wake Up Art Cullagh / Thaniel-related quests.

* Karlach’s infernal engine progress with Dammon.

* Rolan in the Shadows, Arabella’s parents, Omeluum, and other unfinished side quests.
  • Do the Mountain Pass / Githyanki Creche content if you still have it open from Act 1.

Important warning

Entering Shadowfell is treated as a major lock-in point , and some earlier areas and quest outcomes can change after you proceed. If you care about story completion or loot, make a manual save before crossing in.

Simple rule

If you are asking yourself, “Should I leave anything for later?” the safest answer is yes—finish it now if it matters to you.

If you want, I can turn this into a spoiler-light checklist or a full Act 2 pre-Shadowfell checklist.