Klen is thinking, what is the point? But then he sees Luna walking towards him, symbolizing he is choosing his path even at a young age. Meanwhile, I love Alicia embracing the idea of being a fake hero. The point of this whole season is don't let the definition of others define what a hero is. A hero isn't just someone who saves the world or defeats the final boss. They are also there to help people in need, like Nell.
Of course Alicia could never defeat Drel. Instead of trying to go for the kill, she went for an achievable target, and that is her sword. As breaking regalia is a big deal. What this really showed was how merciless Vordin was. I assume without the regalia things would have been much harder for what Vordin wanted to achieve. So he killed Drel for that failure. Considering that Klen can be cruel himself, that feels like nothing compared to Vordin. Basically, Alicia beat Drel because Klen is a more forgiving master than Vordin.
This anime has been countlessly brutal, but the scene of Luna walking to his mother's arms was such a beautiful scene. Also, Anzetta is simply a beautiful, kind woman. Nell acting how she did makes sense, but Anzetta only cared that her son is alive and well now. She looks to be a great ally to have to come.
Of course Vordin will not be lying around. But what are his main goals? He mentions the awakening of Toah? More than likely it is connected to the book, but it is clear that there must be multiple books. More than likely, finding these various books will be what leads to some answers and perhaps more questions.
So Klen's deciding to be Luna's magic teacher is quite interesting considering he is just learning about magic. Though I assume he plans to learn more about magic, and then when Luna grows older, he can teach him more.