Set Facts
- The set features a cape-wearing, spear-holding Fire Knight Mech locked in battle with an ancient sea monster with movable tentacles.
- The model includes two NINJAGO minifigures: Kai with a magical sword, and a fisherman with a paddle in a boat.
- The set is based on the NINJAGO Legends Monstrosity series.
Regional Retail Prices (LEGO.com/Store)
The Fire Knight Mech Reviews
BrickEconomy Member Review
“The Fire Knight Mech features a highly detailed, posable mech equipped with a cape and spear, engaged in battle with a sea monster. It includes two minifigures: Kai, who can be placed inside the mech's chest, and an exclusive fisherman. The set is designed for display, complete with a circular stand.”
Brickset
“NINJAGO offers no shortage of stunning mechs and 71846 The Fire Knight Mech adds another to the selection. The mech looks splendid in the stance shown on the packaging, attached to its base and fending off the sea monster, but also benefits from extensive articulation, which... More 71847 The Guardian Dragon lacked. I still narrowly favor the dragon, but the mech is far better than I expected!”
Full review at brickset.com
Subtheme Analysis
Community Stats
The Fire Knight Mech currently ranks #2 out of the top most owned sets in Ninjago Legends.
About Ninjago Legends

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.
Legends was introduced in 2025 and currently consists of 5 sets.
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Older NINJAGO fans aged 14 and up can add to their collection of LEGO NINJAGO models with this stunning and highly detailed The Fire Knight Mech (71846) building kit. It features a dramatic scene of a cape-wearing, spear-holding mech locked in battle with an ancient monster emerging from the sea, and it will look great on display in a bedroom.
Ninja fans can also remove the model from its base to recreate stories from the NINJAGO Legends Monstrosity series. The mech has posable features and the sea monster has movable tentacles. The model also comes with 2 NINJAGO minifigures: Kai with a magical sword, who can be placed inside the mechs chest, and a fisherman with a paddle in a boat.
The rest of the LEGO NINJAGO range of sets (sold separately) includes dragons, vehicles and temples for fans to role-play adventures with their heroes. Each ninja playset can be created with the LEGO Builder app, which guides you on an easy and intuitive building adventure. Set contains 996...
Description provided by LEGO©