The Mountain Cave

Notable parts

• 4 parts come in a colour no other set has for that mould: Equipment Shovel Blocky (Flat Silver); Plate Special 2 x 6 with Pole Holder Pin (Light Bluish Gray); Spiral [Fireman] Pole 32L (Dark Tan); Windscreen 2 x 4 x 2 Vertical (Trans-Bright Green).
• 5 printed parts are only in this set: Animal Body Part, Head Blocky with Pixelated Face with Red Eyes Print (Wolf) (Light Bluish Gray) ×2; Brick 2 x 2 with Dark Green Square Print (Trans-Bright Green) ×2; Food Steak on Bone with Dark Red Meat Print (White); Panel 1 x 2 x 1 [Rounded Corners] with Green Square (Trans-Bright Green); Tile Round 1 x 1 with Blue, Yellow and Black Minecraft Print (Pearl Gold).
• 9 parts appear in only a few other sets: Minifig Head Special, Cube [Plain] (Dark Brown) — also in 21127 The Fortress (all Minecraft); Plant, Apple (Pearl Gold) — also in 21145 The Skull Arena (all Minecraft); Plate 1 x 1 with Red, Purple Pixels (Minecraft) (Dark Blue) — also in 21147 The Bedrock Adventures (all Minecraft); Tile 2 x 3 - Centered Black Minecraft Style Arrow - Dark Brown Lines with… (Medium Nougat) ×2 — also in 21146 The Skeleton Attack, 21155 The Creeper Mine (all Minecraft); Tool Pickaxe Blocky, Double (Medium Lavender) — also in 21131 The Ice Spikes, 21136 The Ocean Monument (all Minecraft); Brick 2 x 2 without Inside Ridges (Trans-Medium Blue) ×9 — also in 21120 The Snow Hideout, 21131 The Ice Spikes, 21142 The Polar Igloo (all Minecraft); Helmet Rectangular (Pearl Gold) — also in 21127 The Fortress, 21252 The Armory, 472506 Hero with Crafting Table, Furnace and Anvil (all Minecraft); Tile 2 x 2 with Pixelated Blue, Green and White Map on Tan Background Print (Dark Tan) — also in 21144 The Farm Cottage, 21152 The Pirate Ship Adventure, 21163 The Redstone Battle (all Minecraft); Minifig Neckwear Armour Breastplate Rectangular (Minecraft) (Pearl Gold) — also in 21127 The Fortress, 21168 The Warped Forest, 21243 The Frozen Peaks, 662401 Stray, Crystal Knight and Shooter (all Minecraft).
• 2 parts are otherwise only found in Minecraft sets: Legs, Long, Enderman (Black); Minifig Neckwear Armour Breastplate Rectangular (Minecraft) (Flat Silver).
• 3 moulds first came out in 2017, including in this set: Plate Special 2 x 2 Wedge, Center Stud, 1 x 1/2 Raised Tab ×42; Tile 2 x 2 Curved, Macaroni ×9; Tile 4 x 4 Curved, Macaroni ×5.
• 7 existing moulds first came out in their colour in 2017, including in this set: Plate Special 4 x 4 with 2 x 2 Opening (Dark Bluish Gray) ×21; Plate 6 x 6 (Sand Green) ×12; Bar 1 x 4 x 3 [End Tabs] (Medium Nougat) ×8; Plate 6 x 6 (Medium Nougat) ×7; Minifig Neckwear Bracket [One Stud] (Dark Brown) ×4; and 2 more.
• 1 minifigure part with this print is only in this set: Minifig Head Special, Cube with Rear Ledge, Pixelated White and Tan Face, Dark… (Black).

Calculated from Rebrickable’s public set inventories, excluding sticker sheets and spare parts.