The marauders reveal their greatest secret to Remus on the full moon - they've become Animagi. James transforms into a majestic stag, Sirius becomes a large black dog, and Peter turns into a brown rat. Their years of secret study and practice culminate in this moment as they join Remus in the Shrieking Shack for his transformation. For the first time, the wolf has a pack, and Remus experiences a full moon without pain or self-harm. The chapter explores Remus's intense internal struggle with his sexuality and attraction to Sirius, while building to this pivotal moment of friendship and magical achievement.