Raven's Slumber

The Raven's Slumber is a magical amulet that belonged to the Champion of the Raven Queen, Purvan Suul. It was recovered from his tomb by Vox Machina and eventually given to Vex'ahlia.

Appearance
Raven's Slumber is a black crystal sharpening to a point on one end. It has a loop to carry as a necklace.

The interior is a singular darkened chamber with three stone walls and a stone throne in the center facing towards a glass window the size of the wall. The window shows an image of the perspective of the necklace.

Properties
The Raven's Slumber contains a demiplane that can be used to store a living creature indefinitely. This demiplane takes the form of a twenty-square-foot stone room with a throne in the center. On one of the walls is a rectangular window through which the creature contained within can view the outside world from the perspective of the amulet.

If a creature is willing, they can be placed within Raven's Slumber immediately. If they are unwilling, they must succeed a Wisdom saving throw (DC 10) to resist being placed inside.

If Raven's Slumber is attacked from within, suffering approximately 280 points of damage, the necklace eventually shatters and the creature contained inside is released.

While in the Feywild, Vex'ahlia encountered the gigantic spirit bear Orlan. Trinket defended her, both through fighting and with his words of devotion, and the creature allowed them to go in safety. As its ethereal form passed through them, it imbued Raven's Slumber with a slowly fading blue radiance, allowing Trinket to instantly be transported into the safety of the amulet and stabilized when Trinket falls unconscious outside of Raven's Slumber but still within range of it, as well as use a benefit from Vex's Hunter's Mark and to use Primal Fury once per short rest, which granted Trinket advantage on attacks and allowed a natural 19 roll to be considered a critical hit.

Notable uses
When Vox Machina first obtained the amulet it contained Galdric, the wolf companion of Purvan Suul. After the party released him from the amulet, they decided to give it to Vex'ahlia as an easier method of transporting her own companion, Trinket. As Trinket is a fully grown brown bear, the party had frequently struggled to get him through tight spaces and over obstacles. Once Vex'ahlia was given the amulet, transporting her companion became much easier.

Vex'ahlia used Raven's Slumber to save Grog's life during the battle against Kevdak and the Herd of Storms. Grog had been surrounded by Herd members who were intent on ending his life, but Vex quickly swooped down on her Broom of Flying and placed Grog within the amulet, essentially airlifting him to safety. Soon after that, she released Grog in the air above Kevdak, allowing him to deal the killing blow against his uncle.

While in the Feywild, Vox Machina came upon the campsite of Tsoradun the Happy, which charmed Scanlan and Vax'ildan into dancing uncontrollably around the campfire. Vex used Raven's Slumber on her brother to carry him out of range of the enchanted music.

Trivia

 * The players often refer to Raven's Slumber as a Poké Ball in reference to the Pokémon franchise. Poké Balls are small round capsules used to capture and store the creatures called Pokémon, much like how Vex'ahlia uses Raven's Slumber to carry around Trinket and send him into battle.
 * According to Trinket in, he feels cramped when inside the Raven's Slumber, and watching the outside world feels like a tiny television.