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71815 LEGO Ninjago Kai's Source Dragon Battle thumbnail image

71815 LEGO Ninjago Kai's Source Dragon Battle
Images 6Description 
71815 LEGO Ninjago Kai's Source Dragon Battle
  • Kai's Source Dragon Battle thumbnail
  • Kai's Source Dragon Battle thumbnail
  • Kai's Source Dragon Battle thumbnail
  • Kai's Source Dragon Battle thumbnail
  • Kai's Source Dragon Battle thumbnail
  • Kai's Source Dragon Battle thumbnail

LEGO 71815 Kai's Source Dragon Battle is a Ninjago set valued at $42 for new and sealed sets, up 10% from an original retail price of $37.99. The set retired in August 2025 with annual appreciation averaging 11.85% since. On the used market, values range from $33 to $37 based on condition. Secondary market prices for new and sealed sets typically fall between $40 and $54.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Kai's Source Dragon Battle since August 2025. Medium accuracy
LEGO 71815 Kai's Source Dragon Battle is a Ninjago Dragons Rising Season 2 set released in 2024, containing 120 pieces and 4 minifigures. The main build is a posable red dragon with a movable jaw, head, tail, legs, and wings, and a flame element in its mouth, featuring a printed head piece. Side builds include a small landscape section, a cannon cart, and flame elements. The minifigures are Climber Kai, Wyldfyre, a Wolf Mask Guard, and a Wolf Mask Warrior, and the set is designed as a 4+ build.

A new and sealed Kai's Source Dragon Battle is currently valued at around $42, with annual growth of approximately 12%, which is lower than other Dragons Rising Season 2 sets. The average used price is $35 for those in good overall condition. New and sealed listings currently range from $35 to $54. Based on current trends, this set could be valued near $47 within the next year. The set was available for 17 months, from March 2024 to August 2025.
All regions

For Sale (New/Sealed)

 (US) 71815 Ninjago Kai's Source Dragon Battle 120pcs New
BrickEconomy Choice
$29.99
(US) NINJAGO: Kai's Source Dragon Battle (71815) $34.86
-16.4%
(NL) BrickLink store BRICKSHOP Holland $38.23
-8.3%
(US) Brand new and sealed, ships from USA. Box in great condition. If collector and needi... $39.88
-4.4%
(NL) Complete, sealed $40.48
-2.9%
(NL) BrickLink store Super Brick Store $40.48
-2.9%
(DK) BrickLink store Basteq $41.64
-0.1%
(US) Amazon listing for Kai's Source Dragon Battle $43.79
+5.0%
(JP) Kai'S Battle With The Dragon King_ $52.05
+24.8%
(US) NINJAGO Kai's Source Dragon Battle 71815 $53.93
+29.3%
(US) NINJAGO Kais Source Dragon Battle Adventure Playset with Multicolor $54.88
+31.6%

Sales Distribution (Last 90 Days)

This chart shows the distribution of sales for the past three months of new/sealed 71815 Kai's Source Dragon Battle.

Sale Trends

This chart shows the sales trends (number sold) of new/sealed 71815 Kai's Source Dragon Battle.

Sets in Ninjago / Dragons Rising Season 2

71814 Tournament Temple City

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 3,489 / 13
Availability Retail
71814 LEGO Ninjago Tournament Temple City
Retail $249.99
Available at retail

71822 Source Dragon of Motion

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 1,716 / 6
Availability Retired
71822 LEGO Ninjago Source Dragon of Motion
Retail $149.99
Value $243.57
Growth  +62.4%

71819 Dragon Stone Shrine

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 1,212 / 6
Availability Retired
71819 LEGO Ninjago Dragon Stone Shrine
Retail $119.99
Value $99.99

71813 Wolf Mask Shadow Dojo

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 1,190 / 8
Availability Retired
71813 LEGO Ninjago Wolf Mask Shadow Dojo
Retail $119.99
Value $152.93
Growth  +27.5%

71821 Cole's Titan Dragon Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 1,055 / 1
Availability Retired
71821 LEGO Ninjago Cole's Titan Dragon Mech
Retail $99.99
Value $156.42
Growth  +56.4%

71818 Tournament Battle Arena

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 659 / 6
Availability Retired
71818 LEGO Ninjago Tournament Battle Arena
Retail $49.99
Value $64.86
Growth  +29.7%

71812 Kai's Ninja Climber Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 623 / 4
Availability Retired
71812 LEGO Ninjago Kai's Ninja Climber Mech
Retail $69.99
Value $99.99
Growth  +42.9%

71820 Ninja Team Combo Vehicle

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 576 / 6
Availability Retired
71820 LEGO Ninjago Ninja Team Combo Vehicle
Retail $89.99
Value $89.95

71809 Egalt the Master Dragon

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 532 / 5
Availability Retired
71809 LEGO Ninjago Egalt the Master Dragon
Retail $69.99
Value $84.96
Growth  +21.4%

71808 Kai's Elemental Fire Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 322 / 4
Availability Retail (Retiring soon)
71808 LEGO Ninjago Kai's Elemental Fire Mech
Retail $29.99
Available at retail
Retiring soon

71811 Arin's Ninja Off-Road Buggy Car

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 267 / 4
Availability Retired
71811 LEGO Ninjago Arin's Ninja Off-Road Buggy Car
Retail $49.99
Value $55.00
Growth  +10.0%

71817 Lloyd's Elemental Power Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 253 / 3
Availability Retired
71817 LEGO Ninjago Lloyd's Elemental Power Mech
Retail $19.99
Value $38.71
Growth  +93.6%
Annual growth 29.3%

71806 Cole's Elemental Battle Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 235 / 2
Availability Retired
71806 LEGO Ninjago Cole's Elemental Battle Mech
Retail $19.99
Value $30.62
Growth  +53.2%

71807 Sora's Elemental Tech Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 209 / 2
Availability Retired
71807 LEGO Ninjago Sora's Elemental Tech Mech
Retail $19.99
Value $34.83
Growth  +74.2%

71810 Young Dragon Riyu

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 132 / 3
Availability Retired
71810 LEGO Ninjago Young Dragon Riyu
Retail $14.99
Value $24.98
Growth  +66.6%

71804 Arin's Battle Mech

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 104 / 2
Availability Retired
71804 LEGO Ninjago Arin's Battle Mech
Retail $14.99
Value $15.79
Growth  +5.3%

71816 Zane's Ice Motorcycle

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 84 / 1
Availability Retired
71816 LEGO Ninjago Zane's Ice Motorcycle
Retail $9.99
Value $11.96
Growth  +19.7%

71805 Jay's Mech Battle Pack

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 78 / 4
Availability Retired
71805 LEGO Ninjago Jay's Mech Battle Pack
Retail $9.99
Value $19.99
Growth  +100.1%

30675 Tournament Training Ground

Theme / Subtheme Ninjago / Dragons Rising Season 2
Year 2024
Pieces / Minifigs 55 / 2
Availability Retired
30675 LEGO Ninjago Tournament Training Ground
Retail $4.99
Value $10.00
Growth  +100.4%
Annual growth 20.2%

My Collection

Kai's Source Dragon Battle Reviews

35 reviews
4.7
Collectors
Investors
“Kai’s Source Dragon Battle is the only set in the lineup with a 4+ tag on it. It’s very clear to see that this is intended for younger builders, but those younger builders definitely get a lot to play with. As for our figures of the set, we get two goodies and two baddies.... More Our good guy team has Climber Kai and Wyldfyre, much alike Kai’s Climber Mech . This set is the easiest way to get these figures without forking out a huge amount, and I’m glad that we get Wyldfyre in more price-accessible sets.”
Full review at www.brickbanter.com
BrickEconomy Expert Review
“Compared to the Young Riyu set, it's more affordable yet lacks dynamic elements like larger dragons or detailed landscapes. The 'dragon' in this set, with its two-legged design, leans more towards a Wyvern classification. The inclusion of recurring villain characters alongside the fresh appearances of Kai and Wyldfyre, both of whom boast significant improvements over their predecessors, adds a nice touch to the set's character lineup.”
 

About Ninjago Dragons Rising Season 2

LEGO Ninjago, also known as Ninjago: Masters of Spinjitzu, theme was introduced in 2011 and included sets that are based off of original storylines, a TV series and The LEGO Ninjago Movie, a movie based on the theme. The main premise of the Ninjago universe is based around six teenage Ninja, Kai, Jay, Cole, Zane, Nya, and Lloyd, who have been trained by their master Sensei Wu, fighting forces of evil to protect the land of Ninjago.

Dragons Rising Season 2 was introduced in 2024 and currently consists of 20 sets. As of today, 71822 Source Dragon of Motion is the most valuable Dragons Rising Season 2 set with an estimated new/factory sealed value of $244.
Summary
Ninjago Dragons Rising Season 2 Kai's Source Dragon Battle set 71815 was released in March 2024, retailing for $38, but has since been retired. New, unopened Kai's Source Dragon Battle sets are valued at $42, while used sets can be found for $35.
Read more
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...
Description provided by LEGO©