The Mad Masker is no longer officially supported by Legacy, as the author, VICN, is no longer distributing it. The Legacy features will stay for those who already have the mod.
If you have The Mad Masker mod and the Legacy patch for it loaded, this room will be added to the Hall of Oddities.
Only the leveled list version of the mod works with Legacy. You will not be able to display most of the items if you use the non-leveled list version.
To get to Pelagius' Mind, you need to complete the quest 'The Mind of Madness' given to you by Dervenin in Solitude. The quest will require you to go to Pelagius' Wing in the Blue Palace. After quest completion, you will be able to return to Pelagius' Mind by equipping the Wabbajack and using Pelagius' Hip Bone when in the Blue Palace or Pelagius Wing. To get back to the door of the Blue Palace, use the bedroll inside Pelagius' Mind.
Below is a list of all displays in the room, starting from the left.
Note: These mannequins are generic ones. They are intended to display the following armor pieces, but this is not mandatory; and displaying items here will not increase your total display count.