Concept idea: The Corridor of Elders episode but instead the last fight is Garmadon vs Chen.
And it’s just the second half of the Kratos vs Heimdall fight.
By that, I mean Garmadon just beats the breaks right off Chen and it just makes the fights he had with the Ninja look like child’s play.
He’s only beating Chen so hard because Chen injured/almost killed Lloyd in battle. (Lloyd was too angry to think during the fight, he got knocked out and began bleeding when Garmadon saw him while the others were being pushed back by the Cultists and not able to reach him.)
The last thing Chen barely gets out is “you… haven’t changed.. one bit” and he just dies underneath Garm’s hold on him. The Anacondrai Cultists see he’s gone and Garmadon standing over him looking more monstrous than them with his blood covering him and they try to retreat only to get caught.
And the Ninja see he never needed the Devourer venom to be violent and are mostly glad he’s on their side now.