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Harry Potter - LEGO Triwizard Tournament Black Lake 76420

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Underwater Rescue at The Black Lake

The Great Lake, alternatively known as the Black Lake, was a large body of water that set the stage for the Second Task of the Triwizard Tournament. A landlocked freshwater lake located to the south of Hogwarts Castle, which stands on a cliff overlooking the water, it had a number of very unusual inhabitants, including a Giant Squid, a village of Merpeople, and many Grindylows.

Kids can stage a spellbinding contest with the LEGO® Harry Potter™ Triwizard Tournament™: The Black Lake (76420) playset. A top gift idea for kids aged 8 and up, it features a buildable underwater scene with an arch ruin, 2 caves and flexible LEGO elements to create the effect of 2 minifigures floating. There is also a pier model, with a minifigure-diving function, which can be placed on top of the underwater scene.


  • 349 LEGO® Pieces
  • 5x Minifigures:
    • Harry Potter with flipper elements
    • Viktor Krum with shark head element
    • Hermione Granger
    • Ron Weasley
    • Merperson


  • Iconic characters - Bring a classic Harry Potter and the Goblet of Fire™ scene to life with 5 LEGO minifigures, including Harry Potter with flipper elements and Viktor Krum with a shark head element to help them rescue Hermione Granger™ and Ron Weasley™. Fans will also be inspired to play by the Merperson minifigure, new-for-March-2023 Grindylow figure and accessory elements such as the Gillyweed potion.
  • App-assisted building - Let the LEGO Builder app guide your youngster on a building adventure where they can zoom in and rotate models in 3D, save sets and track their progress.
  • Stage a magical contest - Kids can play out Triwizard Tournament™ tasks at the Black Lake from Harry Potter and the Goblet of Fire™ with this LEGO® Harry Potter™ building set (76420) for ages 8 and up
  • 5 LEGO® minifigures and 2 LEGO figures - Harry Potter™ with flipper elements, Viktor Krum with a shark head element, Hermione Granger™, Ron Weasley™ and a Merperson, plus Grindylow and crab figures
  • Black Lake underwater scene - Features a buildable arch ruin with 2 flexible LEGO® elements to create the effect of Hermione Granger™ and Ron Weasley™ floating, plus 2 caves with hidden treasure
  • Buildable pier model and rowboat - The pier features a minifigure-diving function and a rotating clock, plus accessory elements inside including a kettle and Gillyweed potion
  • Gift idea - Give this 349-piece buildable LEGO® Harry Potter™ playset as a surprise reward, birthday present or holiday gift to kids who are into Harry Potter and the Wizarding World
  • Build, play and display - The pier model measures over 18cm high, 12cm wide and 6cm deep and can be placed on top of the underwater scene
  • A helping hand - The LEGO® Builder app guides your youngster on an intuitive building adventure with tools that let them zoom in and rotate models in 3D, save sets and track their progress
  • Part of an extensive assortment - LEGO® Harry Potter™ toy building sets let young wizards, witches and Muggles™ role-play iconic scenes, make up their own adventures or simply display the models
  • High quality - Since 1958, LEGO® components have complied with stringent industry quality standards to ensure they connect consistently and securely
  • Safety first - LEGO® bricks and pieces are tested in almost every way imaginable to make sure they comply with rigorous global safety standards


  • Pieces: 349
  • Size: 18cm H x 12cm W x 6cm D approx when assembled
  • For Ages: 8+

Official Harry Potter licensed merchandise

Franchise Harry Potter Brand Harry Potter Construction type LEGO Category Construction Sku294038
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