Webby, incorrectly, thinks that Lena is afraid of the dark. This actually makes sense since Lena spent several months trapped in the shadow realm, so Webby has good reasons to think that Lena isn't comfortable in a dark area.
Dewey is uncomfortable thinking about the idea of getting into a romantic relationship, so his mental concept of his love interest is still completely amorphous. Said concept also has an ambiguously gendered voice; Dewey doesn't even know what gender(s) he'll be interested in yet, if any.
The first time we see a bit of Lena's Forced Transformation into a Magica clone, she's awake...after at least a day or so of uninterrupted consciousness and Anxiety Dreams before then. At that point, she was likely suffering microsleep symptoms, including visual hallucinations from going into a partial dreamstate. By staying awake for that long, all Lena was doing was making herself vulnerable to Magica's dream manipulation while awake, playing into her hands either way.
Switch the words of the previous episode with Lena: Magic hates friendship. Magica hates the friendship between Webby and Lena!
Lena turning into a Gargoyle-like creature is an accurate reflection of herself. She sees herself as a monster, yet she's actually kind. Just like the Gargoyles, who appear monstrous but (aside from Demona) are truly noble.
Louie in his dream resembles a green Garfield. Garfield is a cat well known for his laziness, a trait he shares with Louie.
Fridge Horror
Apparently Magica can take her powers mentally if they're given away. What happens when she finds a means of Mind Control as another way to force Lena to give her the powers?
Even worse, the amulet is fused to Lena, and it's what is keeping her alive. If Magica does pry out the amulet, it will kill Lena in the process.
Alternatively, the amulet is at least keeping her anchored in the real world. So removing it might mean she's still alive but sent back to the Shadow Realms. Don't know which scenario is worse.
That prototype dream manipulator has unsettling implications.
First, Magica's use scenario should be an extreme edge case, being used on her living shadow to retake magical powers. The implication in other episodes is that Magica can't actually retake her powers from Lena without a physical hand-off of the amulet in the real world, because they no longer share a magical connection; Magica can no longer exert direct control over Lena's actions on her own. What exactly is the manipulator doing that Magica can just get her magic back through it?!
Second, if the rule holds that Magica can only get her magic back through physical possession of the amulet, it follows that her exerting control over Lena in the dream is simply a means of getting her to deliver it. Magica's in the forest outside of the mansion and can't get in on her own, so Lena would have to walk that whole distance without having second thoughts. The manipulator is capable of doing this.
Third, who did Magica steal the manipulator from? None of the geniuses in the show work with this kind of tech directly; Gyro comes closest but this isn't something that has a clear practical use, and he's shown to immediately go to Scrooge when an invention gets stolen or misplaced.
