Hogwarts: Room of Requirement

What there is most of

• Technic Brick 1 x 1 with Pin Hole · Light Bluish Gray×18
• Brick 1 x 1 · Tan×12
• Brick Sloped Inverted 45° 2 x 1 · Tan×12
• Brick Special 1 x 1 with Stud on 1 Side · Tan×11
• Brick 1 x 1 · Medium Nougat×10
• Brick 1 x 2 · Tan×10
• Brick 2 x 2 Corner · Tan×10
• Brick Arch 1 x 3 x 3 [Gothic] · Tan×10
• Plate 1 x 1 · Medium Nougat×10
• Brick Special 1 x 2 with Masonry Brick Profile · Medium Nougat×9
• Brick Special 1 x 1 with Scroll with Open Stud · Tan×8
• Brick 1 x 3 · Tan×7
• Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope) · Sand Green×7
• Plate 1 x 3 · Tan×7
• Brick 1 x 2 x 2 with Inside Stud Holder · Tan×6
• Brick Sloped 45° 2 x 1 with Bottom Pin · Sand Green×6
• Plate 1 x 1 · Olive Green×6
• Plate Special 1 x 4 with 2 Studs with Groove [New Underside] · Dark Tan×6
• Tile 2 x 2 Corner · Dark Tan×6
• Brick Sloped 45° 2 x 1 with Bottom Pin · Dark Bluish Gray×5

The twenty most numerous parts, longest bar first. Start a checklist to see all 217 part types and tick them off as you find them.