Hogwarts Chamber of Secrets

2 parts come in a colour no other set has for that mould

• Hair Swept Back with Widow's Peak Chin-Length and Bushy in BackGlow in Dark White
• Slide Straight 4 x 6 x 6Black

1 printed part is only in this set

• Animal / Creature Body Part, Snake / Dragon Head Upper Jaw with 3 Ridges…Olive Green

9 parts appear in only a few other sets

• Brick Round 2 x 2 D. Tube with 45° Elbow and Axle Holes (Crossholes) at Each…Olive Green · ×2also in 77092 Great Deku Tree 2-in-1
• Animal, Bird, Owl Small with Open Wings [Plain]Pearl Goldalso in 76422 Diagon Alley: Weasleys' Wizard Wheezes (all Harry Potter)
• Hips and Nougat LegsNougatalso in 21339 BTS Dynamite
• Creature, Pixie with Black Eyes, Mouth PrintOpal Trans-Dark Blue · ×2also in 76411 Ravenclaw House Banner, 76413 Hogwarts: Room of Requirement (all Harry Potter)
• Animal / Creature Body Part, Tail / Claw / Horn / Branch / Tentacle, End…Olive Greenalso in 76205 Gargantos Showdown, 77092 Great Deku Tree 2-in-1
• Animal Body Part, Dinosaur, Raptor / Dilophosaurus Lower Jaw [Plain]Tanalso in 77978 Young T. rex Transport Truck, 76473 Hogwarts Castle: East Wing
• Technic Ball JointGlow in Dark Whitealso in 41688 Magical Caravan, 41685 Magical Funfair Roller Coaster, 41689 Magical Ferris Wheel and Slide
• Cone Half 2 x 4 x 3Sand Green · ×3also in 76387 Hogwarts: Fluffy Encounter, 76402 Hogwarts: Dumbledore's Office, 76401 Hogwarts Courtyard: Sirius's Rescue, 76413 Hogwarts: Room of Requirement (all Harry Potter)
• Brick Round Corner 3 x 3 x 2 Dome TopLight Bluish Gray · ×2also in 7961 Darth Maul's Sith Infiltrator, 75202 Defense of Crait, 76111 Batman: Brother Eye Takedown, 75272 Sith TIE Fighter

3 parts are otherwise only found in Harry Potter sets

• Cone 2 x 2 x 3 JaggedSand Green · ×5
• Brick Sloped 45° 2 x 2 Double ConvexSand Green · ×2
• Cone Half 8 x 4 x 6Sand Green

7 moulds first came out in 2021, including in this set

• Window Round 3 x 3 x 2×4
• Bracket 1 x 1 - 1 x 2 Inverted×2
• Creature, Pixie with Black Eyes, Mouth Print×2
• Animal / Creature Body Part, Snake / Dragon Head Upper Jaw with 3 Ridges…
• Animal / Creature Body Part, Tail / Claw / Horn / Branch / Tentacle, End…
• and 2 more

20 existing moulds first came out in their colour in 2021, including in this set

• Tile Special 1 x 2 with Sloped Walls AKA Money / Gold Bar [Ingot]Dark Bluish Gray · ×6
• Cone 2 x 2 x 3 JaggedSand Green · ×5
• Panel 1 x 6 x 7 with 2 Columns and ArchLight Bluish Gray · ×5
• Plate Round 2 x 2 with Axle Hole Type 1 (+ Opening)Olive Green · ×5
• Plate Special / Shield Rectangular with 4 Studs, HandleReddish Brown · ×5
• and 15 more

15 minifigure parts with their print are only in this set

• Minifig Head Special Snake, Cobra with Open Mouth with Trans-Green Eyes, FlamesLight Bluish Gray · ×2
• Hips and Glow In The Dark White Legs with Sand Green Coat, Belt Print (Nearly…Glow in Dark White
• Hips and Legs Under Dress/Robe with Black Trim, Dark Purple and Gold Under Robe…Magenta
• Hips and Legs Under Dress/Robe with Dark Red Lines PrintPearl Gold
• Hips and Legs Under Dress/Robe with Gold Belt, Dark Orange Floral PrintMedium Nougat
• and 10 more