LEGO 76386 Hogwarts™ Polyjuice Potion Mistake

Welcome to SnapTheBrick, your premier source for all things LEGO! Today, we’re brewing up something special as we step into one of the most famous (and slightly damp) locations in the Wizarding World.

As part of the LEGO Harry Potter 20th Anniversary wave, Set #76386 takes us back to the second-floor girls' lavatory. But is this "Mistake" a brilliant addition to your collection, or should it stay in the pipes? Let’s dive into the potion.

Mission Specs

Feature Details
Set Name Hogwarts™: Polyjuice Potion Mistake
Set Number 76386
Theme Harry Potter™ (20th Anniversary)
Piece Count 217
Minifigures 4 (Harry, Ron, Hermione + Golden Harry)
Dimensions 3 in (8 cm) high, 5 in (12 cm) wide, 2.5 in (6 cm) deep
Year Released 2021
LEGO 76386 Hogwarts Polyjuice Potion Mistake box art featuring the 20th-anniversary golden Harry Potter minifigure. Golden Legacy: The 20th-anniversary branding makes this a must-have for nostalgic collectors.
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The Build Experience

For a 217-piece set, the build is surprisingly satisfying. It focuses on Moaning Myrtle’s bathroom—specifically the central sinks and a single toilet stall. While small, the architectural details capture the "Modular Hogwarts" aesthetic perfectly. The use of tan bricks and arches ensures it blends seamlessly with the larger castle sets like the Chamber of Secrets (76389).

One highlight of the assembly is the sink mechanism. It’s not just a static prop; the central sink unit lifts up to reveal a hidden tunnel, mirroring the entrance to the Chamber of Secrets from the films.

A top-down view of the LEGO 76386 set being built, showing the internal layout of the bathroom. Efficient Design: A bird's-eye view reveals how efficiently the space is used in this compact modular room.

Key Features & Playability

This set is essentially a "Minifigure accessory pack" disguised as a room, and that is its greatest strength. The "Polyjuice" gimmick is executed brilliantly:

  • Transformation: Harry and Ron come with alternative hairpieces and reversible heads to transform into Gregory Goyle and Vincent Crabbe.
  • The Mistake: Hermione includes a specialized cat-head mold for when her potion goes hilariously wrong.
  • Secret Passage: The sink lift-up feature is a clever nod to the lore and adds great play value for kids.
A close-up of the secret sink passage feature in the LEGO Harry Potter 76386 set. Hidden Entrance: The central sink pivots upward to reveal the hidden entrance to the Chamber of Secrets!

The Minifigures: The Real Magic

This set punches way above its weight class in the figure department. You get the core trio with exclusive torso prints (Slytherin robes for the boys!), but the "pièce de résistance" is the Exclusive Golden Harry Potter. This collectible figure was released only for the 20th anniversary and is a centerpiece for any display.

Additionally, the set includes two random Wizard Card tiles (out of 16 to collect), adding a fun "blind box" element to the purchase.

All minifigures and accessories included in LEGO 76386, including the 20th-anniversary Golden Harry Potter. Pure Value: Four minifigures and two wizard cards in a single set? That's what we call magic.

Verdict

Rating: 9.5/10

The LEGO 76386 Polyjuice Potion Mistake is arguably the best "bang for your buck" set in the 2021 Harry Potter wave. It provides essential characters, a classic location, and a high-value anniversary figure. Whether you're building a massive modular Hogwarts or just want a tiny piece of the magic, this is an essential pick-up.

Pros:

  • Includes the exclusive 20th Anniversary Golden Harry Potter.
  • Clever "transformation" play features with extra hair/heads.
  • The Hermione cat-head mold is fantastic.
  • Modular design connects easily to other Hogwarts sets.

Cons:

  • Moaning Myrtle is missing (it’s her bathroom, after all!).
  • The bathroom stall door has a slightly restricted swing.
Check Price on Amazon » *See current price & availability

Note: As an Amazon Associate, I earn from qualifying purchases at no extra cost to you. Product images are courtesy of The LEGO Group.

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