How many pieces does the LEGO Rontu the Master Dragon (71842-1) have?

The LEGO Rontu the Master Dragon set (71842-1) contains 381 pieces. It was released in 2025 as part of the LEGO Ninjago theme.

How can I find missing parts for LEGO set 71842-1?

On BrickMissing you can check which parts from the LEGO Rontu the Master Dragon (71842-1) you already own. Add your LEGO collection and we'll show exactly which of the 381 pieces you're missing and which you already have.

Can I build the LEGO Rontu the Master Dragon with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 381 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Rontu the Master Dragon from?

The LEGO Rontu the Master Dragon (71842-1) belongs to the LEGO Ninjago theme. You can browse all Ninjago sets on BrickMissing to find more sets from this theme.

Rontu the Master Dragon

71842-1 Ninjago 2025 381 parts 7.2% repair risk Intermediate

LEGO NINJAGO Rontu the Master Dragon (71842-1) brings a pivotal creature from season 3 of NINJAGO Dragons Rising to life. This 381-piece set constructs Rontu, featuring a fully posable tail, legs, wings, head, and jaw through articulated joints, enabling dynamic battle poses against the Master of Misfortune, Zarkt. Ninja warriors Lloyd, Sora, and Wyldfyre are included, each armed with a ninja weapon, ready to ride Rontu utilizing the two minifigure positions on its back. The dragon integrates stud shooters under each wing for active play. A brick-built mini shrine with a secret message, revealed by Lloyd’s translucent reveal blade accessory, completes the scene, setting the stage for epic good-versus-evil confrontations.

Parts Inventory

🧱 381 parts

Part	Color	Qty	LEGO price each
Sticker Sheet for Set 71842-1 10113523	Unknown	1×	Check price → View
Plate Special 1 x 2 with Clip Horizontal on Side 11476	Black	2×	€0,15 View at LEGO → View
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Dark Purple	12×	€0,06 View at LEGO → View
Plate Round 4 x 4 with 2 x 2 Round Opening 11833	Black	2×	€0,27 View at LEGO → View
Plate Special 1 x 2 with 5.9mm Centre Side Towball 14417	Dark Bluish Gray	4×	€0,16 View at LEGO → View
Plate Special 1 x 2 5.9mm Centre Side Towball Socket 14704	Light Bluish Gray	8×	€0,13 View at LEGO → View
Tile Round 2 x 2 with Bottom Stud Holder 14769	Dark Purple	2×	€0,07 View at LEGO → View
Slope Curved 2 x 2 x 2/3 15068	Dark Blue	11×	€0,13 View at LEGO → View
Slope Curved 2 x 2 x 2/3 15068	Dark Purple	7×	€0,13 View at LEGO → View
Plate Special 1 x 1 with Vertical Tooth 15070	Pearl Gold	10×	€0,10 View at LEGO → View
Slope 45? 2 x 1 with 2/3 Cutout [New Version] 15672	Dark Purple	4×	€0,05 View at LEGO → View
Weapon Sword / Katana / Shamshir with Capped Pommel [Square Guard] 21459	Pearl Gold	1×	€0,13 View at LEGO → View