I am a bit mixed in this episode. On one hand, I really love all the plot beats and dialogue. On the other hand, I don't feel the situation was dire enough to warrant the Final form.
Other than that, I'm not as impressed with the Final form being basically a weapon spam. I'm mostly okay with the color, it's the chest plate that I'm not into. Honestly, Kiwami Arms on the whole feels kinda...lazy, maybe, and not a whole lot of thought put into it.
The fights scenes with it were well done, though, so there's that. I'll just have to see how it's used later on against stronger enemies.
As I said, plot-wise, it was excellent. Sagara may have voiced his 'intentions' for helping Kouta, but I'm more than willing to bet there's a whole lot more to it. The revelations to who he is and his true intentions will probably be one of the show's final twist, and I hope to god it's a good one. It's one of the things that could make or break the show.
Wait, Redyue was talking about hearing his servant from across the dimensions right before he opened the crack. YGGDRASIL'S crack, the one made using Mai's tree. Is this going to be yet another theory I was right about, that the tree is the cause of all this mess.
I was under the impression that he was referring to the humans that he intends to subjugate. But that is a plausible theory, the fact that the tree had a role in 'opening' Helheim, or something.