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Compare 2 retailers.

Retailer prices for 71815 are sorted by the lowest delivered price when shipping is known.

Retailer prices

Prices tracked across 10 retailers, updated twice a day.

1 II idee+spiel Best deal ideeundspiel.com In stock 2-3 days € 5.49 shipping 22 Sep −8% € 40.44 € 5.49 shipping 2 OO Otto otto.de In stock 2-3 days Free shipping 22 Sep - € 52.80 € 37.99 Free shipping

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Full price history at a glance.

Lowest yet
€34.95
29 Aug 2026 · idee+spiel
Peak price
€52.80
22 Sep 2026 · Otto
Average
€35.81
6% below RRP
RRP
€37.99
reference price

Daily lowest price tracked across 2 retailers in Germany. The dotted line marks LEGO's recommended retail price.

Source: daily measurement at 2 retailers in Germany, 29 Aug 2026 – 22 Sep 2026. RRP via LEGO.com.

Last 12 price points for LEGO 71815 Kai's Source Dragon Battle
Date Price Retailer Stock
€52.80 Otto In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
€34.95 idee+spiel In stock
Price expectation

Price will likely hold steady.

28%
Low · ±6%

Low likelihood of further drops. Current price is near the all-time low.

Estimated price · next 3 months

now · €34.95 expected · €35.65
Price expectation Kai's Source Dragon Battle
Date Price Type
2026-08-29 €34.95 History
2026-08-30 €34.95 History
2026-09-04 €34.99 History
2026-09-05 €34.99 History
2026-09-07 €34.99 History
2026-09-08 €34.99 History
2026-09-09 €34.99 History
2026-09-10 €34.99 History
2026-09-11 €34.95 History
2026-09-12 €34.95 History
2026-09-13 €34.95 History
2026-09-14 €34.95 History
2026-09-15 €34.95 History
2026-09-16 €34.95 History
2026-09-17 €34.95 History
2026-09-18 €34.95 History
2026-09-19 €34.95 History
2026-09-20 €34.95 History
2026-09-21 €34.95 History
2026-09-22 €34.95 History
2026-10-22 €35.18 Forecast
2026-11-21 €35.42 Forecast
2026-12-21 €35.65 Forecast
€37.99 RRP
€34.95 Lowest · 90 days
€52.80 Highest · 90 days
Stable Trend

About this set

For LEGO Kai's Source Dragon Battle (71815), we track 2 retailers in Germany, with 2 currently in stock. This set from the NINJAGO theme has 120 pieces, including 4 minifigures and was released in 2024. The current lowest price is €34.95 at idee+spiel, 8% below the RRP of €37.99. That works out to €0.29 per piece and a saving of €3.04 versus the RRP. The lowest price ever was €34.95 on 29 Aug 2026 at idee+spiel. The set is recommended for builders aged 4 and up. The current price is at or near that low, so this is a strong time to buy. Use price history and stock data to judge whether this is a good time to buy.

Dimensions
19.1 × 26.2 × 6.1 cm
Pieces
120
Age
4+
Explore more

Dive deeper into this set.

All about this set

The LEGO® NINJAGO® Kai’s Source Dragon Battle (71815) playset helps children aged 4+ learn how to build while they enjoy exciting ninja adventures in the NINJAGO universe. This action toy features a red dragon model that children can pose by moving its jaw, head, tail, legs, and 4 wings. Children can also place a fire element in its mouth to scare villains. This LEGO building toy for children comes with 4 minifigures: Climber Kai with a katana sword accessory, Wyldfyre with a katana sword accessory, a Wolf Mask Guard with a spear, and a Wolf Mask Warrior with a sword accessory. There is also a small forest build to trap characters, a powerful shooter vehicle that can fire a large arrow, and 3 small flame elements. This ninja toy has been specially designed to provide a fun experience for children aged 4+ who are discovering the joys of building with LEGO bricks. The set comes with a Starter Brick that provides a partly constructed base to get children building quickly and with confidence.

I received this product in exchange my honest review for Influenster and the LEGO brand. Overall about the product: Well made set that assembles in less than two hours. The moving parts are fluid and sturdy.A solid product from LEGO that is true to form and appealing. An excellent addition to the Ninjago genre. I Highly recommend this product to anybody who has a child, it made them more entertainment when assemble the product and improve their forcus and critical thinking.
Anonymous reviewer · LEGO.com
Media

View the set from every angle.

10 images
LEGO Kai's Source Dragon Battle (71815) Front view LEGO Kai's Source Dragon Battle (71815) - image 1 Image 2 LEGO Kai's Source Dragon Battle (71815) - image 2 Image 3 LEGO Kai's Source Dragon Battle (71815) - image 3 Image 4 LEGO Kai's Source Dragon Battle (71815) - image 4 Image 5 LEGO Kai's Source Dragon Battle (71815) - image 5 Image 6
Reference

Set details

Set number 71815
Theme NINJAGO
Subtheme Dragons Rising Season 2
Year 2024
Pieces 120
Minifigures 4
Price per piece €0.29
Age 4+
Dimensions 19.1 × 26.2 × 6.1 cm
RRP €37.99
Parts

Parts inventory

120
pieces
61 unique parts across 18 colors
Distinctive parts
  • Creature Body Part, Wing 11 x 6 with 3 Bars, Red Marble pattern Part ID 4899pat0003
  • Wheel Hard Plastic (37mm D. x 22mm), Pin Hole Part ID 2148
  • Weapon Sword with Jagged Edges and Trans-Red Flames pattern Part ID 4924pat0001
Building instructions Kai's Source Dragon Battle instruction manual

Minifigures in Kai's Source Dragon Battle.

4 minifigures according to this set's Rebrickable inventory.

All minifigures
Kai (Heavy Shoulder Guards) fig-014780
Kai (Heavy Shoulder Guards)
fig-014780
Wolf Mask Guard fig-014566
Wolf Mask Guard
fig-014566
Wolf Mask Warrior fig-014577
Wolf Mask Warrior
fig-014577
Wyldfyre (Shoulder Guard) fig-014782
Wyldfyre (Shoulder Guard)
fig-014782
More guides
01 / 02
Frequently asked questions

All about the Kai's Source Dragon Battle.

What is the lowest price for Kai's Source Dragon Battle?
The lowest current price we show is €34.95.

Has LEGO 71815 ever been cheaper?
The lowest historical price was €34.95 on 29 Aug 2026 at idee+spiel.

How many pieces does LEGO 71815 have?
This set has 120 pieces.

Which minifigures are included in LEGO 71815?
This set includes 4 minifigures, including Kai, Wolf Mask Guard, Wolf Mask Warrior.

What year is this set from?
LEGO 71815 was released in 2024.

What is the RRP for LEGO 71815?
LEGO's recommended retail price is €37.99.

What is the recommended age for LEGO 71815?
LEGO recommends ages 4+ for this set.

Is LEGO 71815 still available?
Yes, this set is currently available at 2 retailers.

Which retailers do you compare?
We currently compare 2 retailer prices for this set.

How often do you update prices?
We check prices multiple times per day at every tracked retailer and publish the most recent value on this page.