This clever loop bypasses the waiting game of drawing cards by using Unsubstantiate to scoop Approach of the Second Sun right off the stack and back into your hand. Because Approach of the Second Sun only cares that you *cast* another spell with the same name earlier in the game—and not where it resolved from—recasting it immediately from your hand fulfills its ultimate condition. The life-gaining and deck-shuffling downsides are neatly ignored, letting you claim an instant victory in a single turn.