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Kai Fighter

Kai Fighter

70721-1·Ninjago·2014·2 minifigs·81 parts

Used Avg
$27.83
New Avg
$80.74
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About Kai Fighter

Kai Fighter (70721-1) is a LEGO Ninjago set released in 2014, currently averaging $27.83 used on BrickLink. It comes with 2 minifigures worth a combined $11.66. The set has retired from retail, so secondary market is the only option. The full parts inventory runs 81 pieces.

Part-out value

The minifigures account for about 42% of the set's value ($11.66 out of $27.83). The remaining value is in the parts and the set as a complete package. Selling complete will likely net more than parting out unless you have specific demand for the individual figures.

Seller notes

  • Sealed copies sell for $80.74 vs $27.83 used — a 190% premium. If you have this set new in sealed box (NISB), price it accordingly.

Minifigures in Kai Fighter (2)

Kai (Techno Robe) - Rebooted
Kai (Techno Robe) - Rebooted
njo0091$3.46
General Cryptor - Rebooted
General Cryptor - Rebooted
njo0092$8.21

Parts (81)

Tile, Modified 2 x 2 Inverted
Tile, Modified 2 x 2 Inverted
×2
Brick, Modified 1 x 2 with Studs on 1 Side
Brick, Modified 1 x 2 with Studs on 1 Side
×5
Plate, Modified 1 x 2 with Pin Hole on Top
Plate, Modified 1 x 2 with Pin Hole on Top
×2
Slope, Curved 2 x 1 x 2/3
Slope, Curved 2 x 1 x 2/3
×2
Minifigure Bandana Ninja
Minifigure Bandana Ninja
Minifigure, Weapon Techno-Blade
Minifigure, Weapon Techno-Blade
Tile, Modified 1 x 2 Grille with Bottom Groove
Tile, Modified 1 x 2 Grille with Bottom Groove
×3
Plate 2 x 2 Corner
Plate 2 x 2 Corner
×2
Wedge, Plate 3 x 3 Cut Corner
Wedge, Plate 3 x 3 Cut Corner
×4
Brick, Modified 1 x 4 with Channel
Brick, Modified 1 x 4 with Channel
×2
Brick, Modified 1 x 1 with Bar Handle
Brick, Modified 1 x 1 with Bar Handle
×2
Brick 2 x 3
Brick 2 x 3
×2
Brick 1 x 4
Brick 1 x 4
Minifigure, Weapon Sword, Shamshir / Katana (Square Guard) with Uncapped Pommel and Hole in Hilt
Minifigure, Weapon Sword, Shamshir / Katana (Square Guard) with Uncapped Pommel and Hole in Hilt
×3
Plate 2 x 4
Plate 2 x 4
×4
Plate 2 x 3
Plate 2 x 3
×7
Plate 2 x 2
Plate 2 x 2
×2
Plate 2 x 2
Plate 2 x 2
×2
Plate 1 x 2
Plate 1 x 2
×4
Plate 1 x 2
Plate 1 x 2
×9
Plate 1 x 1
Plate 1 x 1
×3
Plate 4 x 6
Plate 4 x 6
Bar   4L (Lightsaber Blade / Wand)
Bar 4L (Lightsaber Blade / Wand)
×2
Slope 45 2 x 2
Slope 45 2 x 2
Brick, Modified 1 x 4 with Studs on Side
Brick, Modified 1 x 4 with Studs on Side
×2
Tile 2 x 2
Tile 2 x 2
Tile 2 x 2
Tile 2 x 2
×2
Plate, Modified 2 x 3 with Hole
Plate, Modified 2 x 3 with Hole
×2
Plate, Modified 1 x 2 with Door Rail
Plate, Modified 1 x 2 with Door Rail
×4
Technic, Brick 1 x 2 with Axle Hole
Technic, Brick 1 x 2 with Axle Hole
Brick 1 x 2 x 2 with Inside Stud Holder
Brick 1 x 2 x 2 with Inside Stud Holder
×2
Plate 1 x 3
Plate 1 x 3
×2
Plate 1 x 3
Plate 1 x 3
×4
Slope, Inverted 45 2 x 2 with Flat Bottom Pin
Slope, Inverted 45 2 x 2 with Flat Bottom Pin
×2
Slope, Inverted 45 2 x 2 with Flat Bottom Pin
Slope, Inverted 45 2 x 2 with Flat Bottom Pin
×6
Plate 1 x 6
Plate 1 x 6
×4
Turntable 2 x 2 Plate, Top
Turntable 2 x 2 Plate, Top
×2
Turntable 2 x 2 Plate, Base
Turntable 2 x 2 Plate, Base
×2
Technic, Brick 1 x 2 with Hole
Technic, Brick 1 x 2 with Hole
×3
Slope, Inverted 33 3 x 2 with Flat Bottom Pin and Connections between Studs
Slope, Inverted 33 3 x 2 with Flat Bottom Pin and Connections between Studs
×2
Plate, Modified 1 x 2 with 1 Stud with Groove (Jumper)
Plate, Modified 1 x 2 with 1 Stud with Groove (Jumper)
×2
Hinge Brick 1 x 2 Base
Hinge Brick 1 x 2 Base
×2
Plate, Round 1 x 1
Plate, Round 1 x 1
×7
Wedge, Plate 4 x 2 Right
Wedge, Plate 4 x 2 Right
Wedge, Plate 4 x 2 Left
Wedge, Plate 4 x 2 Left
Slope, Curved 6 x 1 with 2 Studs
Slope, Curved 6 x 1 with 2 Studs
×2
Plate 2 x 16
Plate 2 x 16
Cone 1 x 1 with Top Groove
Cone 1 x 1 with Top Groove
Cone 1 x 1 with Top Groove
Cone 1 x 1 with Top Groove
×2
Wedge, Plate 12 x 3 Left
Wedge, Plate 12 x 3 Left
Wedge, Plate 12 x 3 Right
Wedge, Plate 12 x 3 Right
Wedge 4 x 4 Triple Inverted with Connections between 2 Studs
Wedge 4 x 4 Triple Inverted with Connections between 2 Studs
Wedge, Plate 8 x 3 Pentagonal Right
Wedge, Plate 8 x 3 Pentagonal Right
×2
Wedge, Plate 8 x 3 Pentagonal Left
Wedge, Plate 8 x 3 Pentagonal Left
×2
Slope, Curved 3 x 1
Slope, Curved 3 x 1
×2
Wedge, Plate 6 x 3 Right
Wedge, Plate 6 x 3 Right
Wedge, Plate 6 x 3 Left
Wedge, Plate 6 x 3 Left
Brick, Round 2 x 2 Dome Top
Brick, Round 2 x 2 Dome Top
Plate, Modified 1 x 2 with 2 Open O Clips (Horizontal Grip)
Plate, Modified 1 x 2 with 2 Open O Clips (Horizontal Grip)
×6
Plate, Round 4 x 4 with Hole
Plate, Round 4 x 4 with Hole
×2
Window 1 x 2 x 3 Flat Front
Window 1 x 2 x 3 Flat Front
×2
Glass for Window 1 x 2 x 3 Flat Front
Glass for Window 1 x 2 x 3 Flat Front
×2
Technic, Pin 1/2 with 2L Bar Extension (Flick Missile)
Technic, Pin 1/2 with 2L Bar Extension (Flick Missile)
×3
Hinge Brick 2 x 2 Top Plate
Hinge Brick 2 x 2 Top Plate
×2
Turntable 4 x 4 Square Base, Locking
Turntable 4 x 4 Square Base, Locking
×2
Tail Shuttle
Tail Shuttle
×2
Minifigure, Utensil Telescope
Minifigure, Utensil Telescope
Tile 1 x 6
Tile 1 x 6
×2
Sticker Sheet for Set 70721 - Transparent Background Version - (16050/6056939)
Sticker Sheet for Set 70721 - Transparent Background Version - (16050/6056939)
Slope, Inverted 45 4 x 4 Double with 2 Holes
Slope, Inverted 45 4 x 4 Double with 2 Holes
Slope, Curved 10 x 1
Slope, Curved 10 x 1
×2
Slope 30 1 x 2 x 2/3
Slope 30 1 x 2 x 2/3
Tile 2 x 4
Tile 2 x 4
×6
Technic, Axle  4L with Stop
Technic, Axle 4L with Stop
Cylinder 1 x 5 1/2 with Bar Handle (Friction Cylinder)
Cylinder 1 x 5 1/2 with Bar Handle (Friction Cylinder)
Plate, Modified 1 x 2 with Clip with Center Cut on Top
Plate, Modified 1 x 2 with Clip with Center Cut on Top
×2
Windscreen 8 x 4 x 2 with 4 Studs and Bar Handle
Windscreen 8 x 4 x 2 with 4 Studs and Bar Handle
Slope 45 2 x 1 with 2/3 Cutout
Slope 45 2 x 1 with 2/3 Cutout
×4
Propeller 1 Blade 10L with Bar (Sword Blade)
Propeller 1 Blade 10L with Bar (Sword Blade)
×4
Bracket 1 x 2 - 2 x 2 Inverted
Bracket 1 x 2 - 2 x 2 Inverted
Flag 5 x 6 Hexagonal
Flag 5 x 6 Hexagonal
×2

Common questions about Kai Fighter

How much is LEGO Kai Fighter (70721-1) worth?

Kai Fighter sells for an average of $27.83 used and $80.74 new/sealed on BrickLink based on 6 months of completed sales. As a retired set, prices tend to hold steady or appreciate over time, especially for complete sets with original packaging. Actual prices vary with completeness — missing minifigures or key parts will lower the value.

What minifigures come in LEGO set 70721-1?

This set includes 2 minifigures: Kai (Techno Robe) - Rebooted ($3.46), General Cryptor - Rebooted ($8.21). The minifigures have a combined BrickLink value of $11.66. Each figure is linked above with individual pricing if you're looking to buy or sell specific characters.

Is it worth parting out LEGO Kai Fighter?

The minifigures make up about 42% of the set value ($11.66 out of $27.83). Most of the value is in the complete set package, so selling it whole is likely the better move unless you have buyers lined up for specific figures.

Is LEGO Kai Fighter (70721-1) retired?

Yes, Kai Fighter was released in 2014 and has been retired from retail for several years. Retired LEGO sets are only available on the secondary market through BrickLink, eBay, or other resale platforms.

How do I check if my Kai Fighter set is complete?

Use the parts list on this page to check every piece and all 2 minifigures. For the minifigures specifically, you can use the brick'em scanner to identify each figure from a photo and confirm it matches what should be in this set. Missing pieces can be individually sourced on BrickLink.

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