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|“Only one can remain.”|
|— Master Chen|
Season 4 of LEGO Ninjago: Masters of Spinjitzu, subtitled The Tournament of Elements, was preceded by Season 3 and succeeded by Season 5. Kai was the focus ninja, Chen served as the main antagonist, and the Anacondrai Cultists were the villainous faction of the season.
After the loss of Zane, the team is split apart, and Lloyd seeks to rebuild it. But everything changes when they find out that Zane is alive, and that crime lord, Master Chen, invites the Ninja and the other Elemental Masters to a Tournament, so that he can steal their powers in order to complete a spell that will turn him and his worshippers into Anacondrai.
|Season Ep #||Series Ep #||Image||Episode name||Airdate|
|01||35||"The Invitation"||February 23, 2015 (US)|
|02||36||"Only One Can Remain"||February 23, 2015 (US)|
|03||37||"Versus"||March 9, 2015 (US)|
|04||38||"Ninja Roll"||March 16, 2015 (US)|
|05||39||"Spy for a Spy"||March 23, 2015 (US)|
|06||40||"Spellbound"||March 30, 2015 (US)|
|07||41||"The Forgotten Element"||March 31, 2015 (US)|
|08||42||"The Day of the Dragon"||April 01, 2015 (US)|
|09||43||"The Greatest Fear of All"||April 2, 2015 (US)|
|10||44||"The Corridor of Elders"||April 3, 2015 (US)|
- Kai - Vincent Tong
- Cole - Kirby Morrow
- Lloyd Garmadon - Jillian Michaels
- Jay - Michael Adamthwaite
- Zane - Brent Miller
- Garmadon - Mark Oliver
- Nya - Kelly Metzger
- Chen - Ian James Corlett
- Clouse - Scott McNeil
- Skylor - Heather Doerksen
- Master Wu - Paul Dobson
- Chamille - Marÿke Hendrikse
- Bolobo - Michael Adamthwaite
- Eyezor - Michael Donovan
- Gravis - Mark Oliver
- Jacob Pevsner - Paul Dobson
- Morro - Michael Donovan
- Shade - Andrew Francis
- Zugu - Brian Dobson
- Chope - Ian Hanlin
- Griffin Turner - Doron Bell Jr.
- Kapau - Alessandro Juliani
- Neuro - Paul Dobson
- Karlof - Scott McNeil
- Paleman - Kirby Morrow
- Although this season focuses on Kai, Lloyd plays a vital role.
- This season marks the beginning of all seasons to date having 10 episodes.