LEGO® NINJAGO 71815 Kai's Source Dragon Battle

Current best price

LEGO 71815 is currently available from $55.99 incl. shipping at Walmart.com. Only one retailer in our comparison stocks it.

Updated November 1, 2026 at 7:00 PM EST

LEGO 71815 price comparison: where is it cheapest?

Prices incl. shipping to the US ·

Brickfact may earn a commission when you buy through a merchant link. Commissions do not determine the order of offers. How Brickfact compares prices

iFurther information
The Lego set Kai's Source Dragon Battle with the set number 71815 is part of the LEGO NINJAGO theme and is recommended for ages 4+. It was released in March 2024. It includes 8 minifigures. The model has 120 pieces, and we estimate it takes around < 1 hour to build. 10 Brickfact users have this set in their collection.
The set weighs about 0.357 kg. The box measures 26.2 x 19.1 x 6.1 cm. The recommended retail price is $37.99.
Our Brickfact Lego price comparison compares the prices of 1 shop for this set. It is currently cheapest at Walmart.com for $55.99 including shipping. That is $0.47 per piece. Unfortunately, the set is currently not available below its recommended retail price.
The Part-Out-Value (POV) is the sum of the average prices paid on bricklink.com for all parts of this set. It is about $35.00.

Lego 71815 product data

Set Information

Set ID
71815
Theme
Pieces
120
Building Time
< 1 hour
Age Range
4+
Minifigures
8

Availability

Release
03/2024
Retiring Status
Retired (07/2025)

Price Information

RRP
$37.99
Insiders Points (for purchase at Lego)
247
Part Out Value
$35.00

Packaging

Weight
0.357 kg
EAN (GTIN13)
5702017584584

Popularity with Brickfact users

users have this set
10

10 Brickfact users have Kai's Source Dragon Battle in their collection.

Based on anonymized Brickfact user collections; shown only for sets with at least 10 users. As of November 1, 2026.

LEGO 71815 price trend

Average sale price on secondary marketplaces – not the new price at retailers.

Current market value
$33.98
Growth vs. RRP
−10.5 % $37.99
Range
$27.73 – $34.54
Average
$31.76

Loading price history…

LEGO 71815 price history: how has the price changed?

Brickfact has been recording retailer prices since 10/12/2026. Best price so far: $37.99 (21 days ago).

Current best price
$55.99 +47% vs. RRP
Best price since 10/12/2026
$37.99 21 days ago

Daily lowest prices at the tracked shops, including shipping. Gaps indicate days with no recorded price. The table lists each shop’s lowest price.

Lowest price per retailer (since 10/12/2026)

Since 10/12/2026, Walmart.com was the cheapest on 11 of 22 recorded days.

RetailerCurrentLowest priceDate
Bestbuy.com–$37.9910/22/26
Walmart.com LogoWalmart.com$55.99$54.9511/01/26

Lowest price per day that Brickfact recorded at the retailers in the price comparison, including shipping where known – as in the comparison above. Amazon offers are not included in the price history.

Minifigures from 71815 Kai's Source Dragon Battle

The Kai's Source Dragon Battle set includes 8 different minifigures, 0 of which are unique to this set. The combined value of the minifigures is $26.39, which is ~69% of the RRP of this set.
x1
Thumbnail of minifigure njo0854
Wolf Mask Guard
NINJAGO
time-logo
2024
#njo0854
$1.84
i
3 sets
x1
Thumbnail of minifigure njo0857
Wolf Mask Warrior - Dark Blue and Dark Azure Mask
NINJAGO
time-logo
2024
#njo0857
$2.22
2 sets
x1
Thumbnail of minifigure njo0870
Kai - Climber Kai
NINJAGO
time-logo
2024
#njo0870
$4.02
3 sets
x1
Thumbnail of minifigure njo0872
Wyldfyre - Dark Red Tunic, Shoulder Armor
NINJAGO
time-logo
2024
#njo0872
$4.04
4 sets
x1
Thumbnail of minifigure njo854
Wolf Mask Guard (71801, 71805)
NINJAGO
time-logo
2024
#njo854
$2.08
3 sets
x1
Thumbnail of minifigure njo857
Wolf Mask Warrior (71808)
NINJAGO
time-logo
2024
#njo857
$2.59
2 sets
x1
Thumbnail of minifigure njo870
Kai - Dragons Rising, Climber, Shoulder Armor
NINJAGO
time-logo
2024
#njo870
$3.96
3 sets
x1
Thumbnail of minifigure njo872
Wyldfyre - Dark Red Tunic
NINJAGO
time-logo
2024
#njo872
$5.64
4 sets

Official Set Description for LEGO 71815 Kai's Source Dragon Battle

The LEGO® NINJAGO® Kai’s Source Dragon Battle (71815) adventure playset helps kids 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 kids can pose by moving its jaw, head, tail, legs and 4 wings. Kids can also place a fire element in its mouth to scare villains.

This LEGO building toy for kids 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 kids building quickly and with confidence.

  • Learn-to-build adventure playset – Kids aged 4 years old and up can be introduced to ninja characters and the joy of building with the LEGO® NINJAGO® Kai’s Source Dragon Battle toy
  • Posable dragon figure – Kids can recreate action from season 2 of the NINJAGO® Dragons Rising TV show by moving the dragon’s jaw, head, tail, legs and 4 wings into different positions
  • 4 LEGO® NINJAGO® minifigures – Ninja playset includes Climber Kai and Wyldfyre, each with a katana sword accessory, a Wolf Mask Guard with a spear and a Wolf Mask Warrior with a sword accessory
  • Forest trap and shooter – This red dragon toy set includes a small forest build used to trap characters, a powerful shooter vehicle that can fire a large arrow, plus 3 small flame elements
  • Ninja gift – This LEGO® buildable model set provides a fun build-and-play experience and is a birthday gift idea for boys and girls aged 4 and up to develop their storytelling skills
  • A helping hand – Discover intuitive instructions in the LEGO®Builder app where builders can zoom in and rotate models in 3D, track their progress and save sets as they develop new skills
  • Introduction to building with LEGO® bricks – 4+ LEGO playsets help youngsters learn how to build, while allowing the rest of the family to share in the fun
  • Measurements – 120-piece LEGO® set with a red dragon model measuring over 3.5 in. (10 cm) high, 11.5 in. (29 cm) long and 7 in. (18 cm) wide

Building Instruction for LEGO 71815 Kai's Source Dragon Battle

LEGO 71815 Frequently Asked Questions

How much does LEGO 71815 Kai's Source Dragon Battle cost?
The lowest price in the Brickfact price comparison is currently $55.99 incl. shipping at Walmart.com. The RRP is $37.99.
Where can I buy LEGO 71815 cheapest?
Only one retailer in the Brickfact price comparison currently stocks LEGO 71815: Walmart.com ($55.99).
Is LEGO 71815 still available?
LEGO has retired 71815 Kai's Source Dragon Battle. New copies are still available at 1 retailers in our price comparison while stocks last.
When was LEGO 71815 cheapest?
Since tracking began on 10/12/2026, the lowest shop price recorded by Brickfact for LEGO 71815 was $37.99 on 10/12/2026 at Bestbuy.com, including shipping. Amazon prices are not included.

All LEGO NINJAGO sets from 2024

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