Considering the title is a secret word that gives us a Beyond Canon Terezi monologue about how she feels like she's failed as a Seer of the Mind, and that even when she searches for options to make things right, even if they survive, they end up not being happy or even becoming worse people; I think Beyond Canon Terezi was using her powers to think of other possibilities of the Alpha timeline (The one where they survives and make a new universe) where other friends survive and how that would affect them, and how most of it has negative consequences...