Retiring soon2x PointsAges 7+

Rontu the Master Dragon (71842)

Name: Rontu the Master Dragon
Brand: LEGO
SKU: 71842

LEGO.com4.8(4)Amazon4.8381 pieces · 10.5p each

Available From

No current price from any retailer we track. LEGO.com lists it at £39.99.

Also available

Amazon UK

Marketplace sellers only

Amazon DE

Not re-checked since 9 Oct 2026

€39.99

Argos

Not re-checked since 13 May 2026

£40.00

LEGO.comOfficial

Sets the RRP everything else is measured against

£39.99

Buy

It was £27.71 at Amazon UK in May. Checked 24 times over 286 days · average £33.76.

Building Instructions Brickset

Price Analysis

Lowest Price Ever

£27.71

at Amazon UK · May 2026

Average Price (12mo)

£33.76

Current vs Average

+18.5%

Above average

Price Trend

Stable

Last 30 days

Best Month to Buy

June

Value Score

10.0/10

Price-per-piece vs theme avg

The lowest price we've recorded for Rontu the Master Dragon is £27.71 at Amazon UK in May 2026. The current price is 18.5% above the 12-month average of £33.76. Historically, June tends to offer the best prices for this set.

Price History & Buying Verdict

VerdictBuy now

•This set is marked as retiring soon by LEGO — once production stops, prices on the secondary market typically rise significantly.
•The current price is 18.5% above the 12-month average of £33.76, so waiting for a drop may pay off.
•On price-per-piece, this is one of the better-value sets in the NINJAGO® range (value score 10.0/10 vs theme average).

We've been tracking the price of LEGO NINJAGO® Rontu the Master Dragon (381 pieces) for 286 days, recording 24 data points across LEGO.com and major UK retailers. Over that period the price has dropped 7 times below previous levels, with the lowest price ever recorded being £27.71 at Amazon UK in May 2026.

The 12-month average sale price for set 71842 works out to £33.76 — that's 15.6% below the LEGO RRP of £39.99. The highest price we recorded across our tracked retailers was £40.00, giving a range of about £12.29 between the cheapest and most expensive observation.

Amazon UK has run the most price drops on this set in the period we've tracked, making it the retailer most worth watching for short-term deals. Historically, June has produced the lowest average prices for Rontu the Master Dragon, so if you're not in a hurry it's worth bookmarking the page closer to that window.

Want to see how LEGO Rontu the Master Dragon (set 71842) compares against other sets? Browse the best-value LEGO sets or check the full price-history tracker.

Description

Rontu the Master Dragon (71842) is a LEGO NINJAGO® set with 381 pieces, with an RRP of £39.99. Prices have been stable over the last 30 days. With a value score of 10.0/10, this set offers excellent value compared to other NINJAGO® sets.

LEGO® NINJAGO® Rontu the Master Dragon (71842) toy lets ninja fans aged 7 and up recreate action-packed scenes from season 3 of the NINJAGO Dragons Rising TV show. This building set for kids features a dragon toy with a posable tail, legs, wings, head and jaw, 2 positions to place a minifigure on its back and a stud shooter under each wing.

4 NINJAGO minifigures are included in the LEGO playset: ninja warriors Lloyd, Sora and Wyldfyre, each with a ninja weapon accessory, plus Master of Misfortune, Zarkt, for kids to play out epic good vs. evil battles. There is also a brick-built mini shrine with a secret message that Lloyd reveals with his translucent reveal blade accessory.

Sets and buildable action toys in the LEGO NINJAGO range (sold separately) include mechs, vehicles and temples so fans can role-play ninja action. Each ninja playset can be created with the LEGO Builder app, which guides you and your child on an easy and intuitive building adventure. Set contains 381 pieces.

Features

LEGO® NINJAGO® dragon toy for kids – Rontu the Master Dragon toy lets boys and girls aged 7 and up recreate scenes from season 3 of the NINJAGO Dragons Rising TV show
Highly posable dragon figure – This large dragon model features a posable tail, legs, wings, head and jaw, 2 positions on its back for a minifigure, plus a stud shooter under each wing
Mini shrine – Battle role-play set features a small brick-built shrine guarded by Zarkt, which contains a secret message that Lloyd can decode with his translucent reveal blade accessory
4 NINJAGO® minifigures – This LEGO® building set comes with ninja warriors Sora, Wyldfyre, Lloyd and the villainous Zarkt with ninja weapon accessories for kids to play out good vs. evil battles
Birthday gift idea for kids – This LEGO® set provides a fun build-and-play experience and is a birthday gift idea for boys and girls aged 7 and up who have a passion for ninja action
A fun way to build – The LEGO® Builder app guides kids on an intuitive building adventure, where they can save sets, track progress and zoom in and rotate models in 3D while they build
A universe of LEGO® NINJAGO® sets – The extensive collection of ninja toy playsets (sold separately) lets kids escape into a fantasy world for imaginative play with their ninja heroes
Measurements – The Rontu the Master Dragon figure in this 381-piece LEGO® NINJAGO® building kit stands over 5 in. (13 cm) tall

Minifigures Included

4 figures

Minifigures in Rontu the Master Dragon. 4 of them appear in other sets we track, which can be a cheaper way to get the same figure.

Wyldfyre
4 parts
Also in 4 other sets›
- Zane's Battle Suit Mech71827 · £8.99 RRP
- Ninja Combat Vehicle71844 · £79.99 RRP
- Arc Dragon of Focus71836 · £89.99 RRP
- The Temple Bounty71848 · £179.99 RRP
Zarkt
4 parts
Also in 2 other sets›
- Arc Dragon of Focus71836 · £89.99 RRP
- The Temple Bounty71848 · £179.99 RRP
Lloyd
5 parts
Also in 1 other set›
- Lloyd’s Jet Mech71845 · £89.99 RRP
Sora
5 parts
Also in 1 other set›
- Lloyd’s Jet Mech71845 · £89.99 RRP

Minifigure data from Rebrickable.

Frequently Asked Questions about Rontu the Master Dragon

What is the best price for LEGO Rontu the Master Dragon (Set 71842)?

LEGO Rontu the Master Dragon (Set #71842) is currently priced at £39.99 on LEGO.com. We continuously monitor prices across multiple UK retailers to find you the best deals.

How many pieces are in LEGO set 71842?

LEGO Rontu the Master Dragon (Set #71842) contains 381 pieces. At the LEGO.com price of £39.99, that works out to approximately 10.5p per piece.

What age is LEGO Rontu the Master Dragon suitable for?

LEGO Rontu the Master Dragon (Set #71842) is recommended for ages 7+. This set is part of the LEGO NINJAGO® theme. View all NINJAGO® sets and deals.

Where can I find the building instructions for LEGO Rontu the Master Dragon?

You can download the official building instructions for LEGO Rontu the Master Dragon (Set #71842) for free from LEGO.com. Download the building instructions here. The instructions are available as a PDF and can be viewed on any device.

Where can I buy LEGO Rontu the Master Dragon in the UK?

LEGO Rontu the Master Dragon (Set #71842) is available from LEGO.com at £39.99. We're monitoring other UK retailers for availability. Check our recent price drops for updates.

What is the lowest price ever recorded for LEGO Rontu the Master Dragon?

The lowest price we've recorded for LEGO Rontu the Master Dragon (Set #71842) is £27.71 at Amazon UK in May 2026. That's 31% off the LEGO RRP of £39.99. Track the latest movements on our LEGO price history page.

Is LEGO Rontu the Master Dragon being discontinued or retiring soon?

Yes — LEGO Rontu the Master Dragon is flagged as retiring soon by LEGO. Once production ends and remaining stock sells through, prices on the secondary market typically climb well above RRP. If this set is on your list, the safest window is now while retailers still have stock. Browse our list of retiring LEGO sets to see what else is on the way out.

Is LEGO Rontu the Master Dragon good value for money?

Comparing piece-count to price across the LEGO NINJAGO® theme, this set scores 10.0 / 10 for value. That works out to about 10.5p per piece. That puts Rontu the Master Dragon in the top tier of NINJAGO® sets for raw build value — you're paying noticeably less per brick than the theme average. Compare against other contenders on our best-value LEGO sets page.