The Sound of Drums (2) - S3-E12
Question: What exactly is the Cruciform?
The Sound of Drums (2) - S3-E12
Question: Why was Lucy so willing to go along with The Master's plan of murder and world domination?
Chosen answer: Because he'd driven her insane by showing her the future and humanity's fate. (There's also the possibility that she might be The Rani in human form, but that's all speculation right now.)
The Sound of Drums (2) - S3-E12
Question: How does staring into time vortex cause the constant drumming in The Master's head? Also, why does it cause it?
Chosen answer: As revealed in "The End of Time" it was the President of the Time Lords who put the drumming back in time into the Master's head.
The Sound of Drums (2) - S3-E12
Question: How exactly did the Time Lords resurrect The Master when he was consumed by The Doctor's Tardis?
Chosen answer: Well they are Time Lords, they can manipulate Time itself to some extent so bringing people back from death wherever or however it happens.
The Sound of Drums (2) - S3-E12
Question: Why are young initiates taken to the Untempered Schism? What purpose does this serve?
Chosen answer: I think that looking into the Untempered Schism shows the young Time Lords infinity. It shows them everything, and it is like a test. If they can resist the urge to grab it and take it all for themselves, then they are worthy to be a Time Lord.
Chosen answer: The Cruciform has not been confirmed to be a location, a weapon, a ship, or some kind of object. It has only ever been mentioned, never described. All we know is that it belonged to the Time Lords. It must have been important in the Time War because the Daleks wanted control of it.