Due to Periwinkle's information of the Temple of Lightning's temporary disorder, the defenders are headed to the Temple of Earth to search of the Earth Core. Valkenhayn informed them that the Temple of Earth have a built in avalanche and he told them not to make a loud noise. Bats are lurking in the temple and the mine cart was found. The defenders are trying the mine cart as a quickest way to the entrance to the room of the Earth Core. The door has a built in puzzle where the defenders crack the code. The defenders are searching around the temple for clues. The first clue to the puzzle is a 7. Second clue is a 4, and the third and final clue is a 9. The answer to the code is a 749. The door opens and the code is cracked. Wind, Darkness, Fire, Water, and Earth are in their possession. All that's left is the Lightning Core. However, the 7th and the final one is not one of the elements.