Mattel Brick Shop Masters of the Universe Clash at Snake Mountain JMB31

Mattel Brick Shop Masters of the Universe Clash at Snake Mountain JMB31 is a buildable fantasy lair set with small figures and scene effects. The listing describes 12 NanoWorld figures, modular access to Skeletor’s throne room, and lava and light-burst elements, making it suited to fans who want both construction play and a display scene.

At a glance

Buildable Snake Mountain lair inspired by the Masters of the Universe film.
The manufacturer describes 12 small NanoWorld figures with swappable poses, including He-Man and Skeletor.
Modular design gives access to Skeletor’s throne room, with extra pieces for posing figures mid-air.
Lava and light-burst pieces are intended to add effects to a built display scene.
Manufacturer claims compatibility with Mattel Brick Shop sets and other name-brand building sets.

Price

$29.99Save 45%

Reference price: ~~$54.99~~

Price checked: Nov 14, 2026

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Often bought together

Mattel Brick Shop Masters of the Universe Battle of Castle Grayskull | Building Set, 867 Pieces and 16 Figures, He-Man, Skeletor, Adult Collectors and Ages 13+

$39.99

Pros and cons

Pros

Combines a buildable lair with 12 poseable figures, supporting both scene-building and character display.
Modular access to the throne room and pieces for mid-air poses offer more ways to arrange the scene.
The listed lava and light-burst elements add themed display details.

Technical specifications

17 specifications

Identity
Brand	Mattel
Model	Mattel Brick Shop Masters of the Universe Clash at Snake Mountain
Model number	JMB31
Recommended age	13 years and up
Theme	Fantasy
Subject character	Snake Mountain
Material	Plastic
Building block type	Interlocking Toy Building Block
Operation mode	manual
Usage	Indoor

Build and features
Listing piece count	630
Set components listing	636 pieces
Figures	12 NanoWorld figures featuring swappable poses, including He-Man and Skeletor.
Special effect elements	lava and light burst special parts
Compatibility claim	Pieces combine with all building sets by Mattel Brick Shop and other name brands.

Dimensions and installation
Dimensions listed	2.63 x 16 x 10.3 inches
Weight listed	1.4 pounds

What to know before buying

Listing details to confirm

The listing gives conflicting piece counts: 630 in the number-of-pieces field, while other listing details state 636. Confirm the count and selected listing contents before buying. The 2.63 x 16 x 10.3-inch dimensions and separately listed size of 16 x 2.6252 x 10.3 inches are also inconsistent, so treat the stated dimensions as uncertain.

What’s in the box

Included

636 pieces

Who is it for?

A good fit for

Masters of the Universe fans who want a Snake Mountain build and character display in one set.
Builders aged 13 and up who enjoy arranging figures and recreating fantasy battle scenes.
Collectors looking for a compact, themed display set with several included figures.

Less suited to

Buyers who need a confirmed piece count or precise assembled dimensions before purchase.
Those seeking large-scale figures, since the set is described as using 1-inch NanoWorld figures.

Mattel Brick Shop Masters of the Universe Clash at Snake Mountain JMB31 · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 29 ratings

5 stars76%76%
4 stars15%15%
3 stars9%9%
2 stars0%0%
1 star0%0%

The aggregate ratings lean positive, with most ratings in the top category and the remainder mainly in the next-highest category. That provides a favorable but limited signal from a small rating sample, not specific evidence about build quality, figure posing or display stability. The listing’s piece-count and dimension inconsistencies remain practical points to resolve regardless of the ratings.