The Shadow Atrium is a Don't Starve Together exclusive item, introduced in A New Reign. It is dropped by the killing a level 3 Shadow Piece and its only purpose is to revive the Odd Skeleton to spawn a Reanimated Skeleton.
Killing the Ancient Fuelweaver will consume the Shadow Atrium used to spawn it.
- The Shadow Atrium was added alongside the Shadow Pieces in the Arts and Crafts update, but it could not be used until the Heart of the Ruins update.
- If the Ancient Fuelweaver dies by stepping out of the Ancient Gateway area, or by pulling the key out, he will drop the Shadow Atrium and the Fossil Fragments instead of his usual drops.