From PsyHelp

• Is a standard Add-on.

How to get it

• "Study" an Attic Blueprint with the required materials

Uses

• Adds 50 additional units to Storage
• Open mysterious chest with Skeleton Keys

Items that can be Received

• Blueberry Wine
• Child's Play
• Dirty Linen
• Maze Piece Summoning Scroll
• Menagerie Blueprint
• Moldavite
• Ornate Vase
• Phoenix Down
• Portrait of Nobility
• Shiny Thingamadig
• Sparkling Doodilly
• Tartan
• The Gourmet's Love-Song
• The Masque of the Red Death
• The Raven
• World Map no. 4