Set Facts
- The set includes Steve and Alex minifigures, a cave spider, wolf, baby wolf, slime, 2 small slimes, 2 bats, zombie, enderman, skeleton, sheep and a charged Creeper.
- The main moving play-feature of the set is the minecart track.
- Just like all other LEGO Minecraft sets, the layout of the Mountain Cave is modular.
- The Mountain Cave in Minecraft is a natural or player-made cave structure within a mountain, often used as a base for protection and resource gathering. It provides ample space for mining, storage, and setting up utilities while blending into the mountainous landscape.
- The Mountain Cave was designed by LEGO designer Robert Heim.
Regional Retail Prices (LEGO.com/Store)
The Mountain Cave Reviews
Is this LEGO set a good investment?
“Over that last few years The Mountain Cave has been a particularly good investment for Minecraft collectors with an annualized growth of upwards of 14.5% per year. However, there is market indication that the set will experience a slight annual growth decrease in the coming years, but this should be only by a few percentage points at most. When compared to the vast majority of set in the Minecraft theme, this set is still an excellent investment for collectors.”
Review brought to you by BrickEconomy Bot
“All in all, The Mountain Cave is an excellent set for LEGO Minecraft fans, and it is also a great parts-pack of basic LEGO elements. The construction is very solid, and the play-features are fun and interesting. I would have perhaps liked to have a bit more modular sections... More like in some of the other LEGO Minecraft sets, however because the cave is hollow inside and need structural stability, I think LEGO designers did the best they could with the layout.”
Full review at thebrickblogger.com
Jays Brick Blog
“The scale of The Mountain Cave is certainly quite impressive and I love that the focal part of this set is an amazing minecart track with an integrated redstone-powered minecart elevator, and an array of other features and functions, including TNT blasting, rotating... More spider-spawner, charged Creeper explosion and a lava burst.”
Subtheme Analysis
Lifespan
22 mos (this set 17 mos)
Annual growth
+6.43% (this set +21.66%)
This set's annual growth (CAGR) vs. subtheme
Community Stats
The Mountain Cave currently ranks #82 out of the top most owned sets in Minecraft Minifig-scale.
About Minecraft Minifig-scale

The LEGO Minecraft theme is based on the video game Minecraft and a collaboration between Mojang and the LEGO Group. Sets in this theme were all based on the traditional LEGO minifigure scale. Minecraft is a sandbox indie game originally created by Notch (Markus Persson) and later developed and published by Mojang / Microsoft. The official release occurred in 2013 with the first set, Minecraft: Micro World: The Forest, released under LEGO Ideas and was created by Mojang through the LEGO CUUSOO program in 2012. At MineCon 2013, LEGO announced brand new minifigure-scale Minecraft sets.
Minifig-scale was introduced in 2014 and currently consists of 109 sets. As of today,
21137 The Mountain Cave is the most valuable Minifig-scale set with an estimated new/factory sealed value of $1,940.
Summary
Minecraft Minifig-scale The Mountain Cave set 21137 was released on July 2, 2017, retailing for $250, it has since been retired. New, unopened sets are valued at $1,940, used ones can be found for $677.
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The mine comprises a spectacular rails circuit with an integrated elevator actuated by the red stone, and various other features and functions, including an explosion in TNT, a rotatable spider generator, an explosion of creeper ™ loaded and lava.
The light brick illuminates the spiders generator, the red stone wall, pumpkin lantern, shelter the first night, the furnace, lava or torch above the entrance to the mine.
This LEGO® Minecraft scalable and easy-to convert is designed for young fans of the video game type sandbox. Includes figures of Steve and Alex, thirteen more creatures including a Creeper ™ loaded.
Includes two figures: Steve and Alex , plus a spider of the mine, a wolf, baby wolf, slime, two little slimes, two bats, a zombie, a Enderman, a skeleton, a sheep and a Creeper ™ charged.
Description provided by LEGO©