Shiva with the 32 shadows, that were gathered left for finding the 'Soul Stone' towards the 'Nature's bosom'.
It wasn't difficult to enter the place since he had summoned Karna now, everyone once again gained the
Combined with the information that the Shadows gained in the past days, they entered the graveyard pretty fast passing through the main gate of 'Nature's bosom where many of the tower's people were there to enjoy a vacation from their violence-filled life.