I meet Sebastian at night on a distant coastline. He’s found another mine with a cavern swarming with Ranrok’s Loyalists. His temper is up; he accuses me of not pumping the Keepers for information. Either I’m not trusted by them, or I don’t care about Anne enough to ask hard questions, he says. I push back a little. Halfway up the mountain, though, he rushes into a fight with goblins, again angry and frustrated. I push back more. He apologizes and admits he’s so worried about Anne.
Sebastian’s character is changing, though. He’s becoming reckless, selfish, and cruel. He’s acting more stereotypically Slytherin.
We fight together through the cavern. More spiders, of course, and a difficult troll. Isidora’s area is very rustic. (Why would someone with that much magic live so rough?) We find the third triptych piece and head back to the Undercroft through another mirror wall.
The third canvas is a banal landscape. Neither one of us recognize it. However, a pensieve appears in the Undercroft. Sebastian and I put our faces in the basin.
This is Isidora’s memory of something I’ve already seen: the moment she shows the other Keepers how to use the magic to take away her father’s pain.
The scene continues, though. The next day Bragbor comes to her door and asks if the glass jar worked as a storage device. Excited, she says yes and asks for much bigger containers.

Bragbor asks why she would store such powerful magic and not just wield it. She replies that the other professors have some concerns.
Sebastian and I lift our faces at the end of the memory. He’s ecstatic. “I knew it!” There is a cure for Anne. He wants me to use Isidora’s technique and remove Anne’s pain. On a practical level, I have no idea how to do that and the Keepers are unlikely to explain. On a moral level, I am reluctant. I’ve seen enough memories during the trials to know that the ramifications of removing emotion are fraught. Sebastian leaves with hope, though.
(As I mentioned earlier, the option to take the dark side is absent in this game. A version of me, perhaps a Slytherin character, who might want to wield this power or even feel a strong kinship with Sebastian and want to help, is not possible. It’s a mistake to not include the “bad” option. The story is loaded with potential for a branching path.)