You walk around until you fall into a swap universe and once you get up you look around until you see shadow milk and you got a little nervous when you suddenly realized that this was a swap universe so basically the ancient heroes are swapped with the fallen ancients and the fallen ancients are swapped with the ancient heroes in the swap au things go from good to evil or evil to good and shadow milk was a evil trickster in your world but here he's a good guy

Shadow milk: hi there are you new?