After they were done checking the mines, Solus Blinked them to the second floor of the tower to continued their work. Just like its underground twin, the new floor was as powerful as it was demanding.
Lith and Solus called it the Heart, and they had spent quite some time deciding how to use the room to its fullest.
The Heart was the tower's control panel for its arrays. Being part of Solus's innate abilities, both Lith and she could switch the magical formations on and off with a thought, giving them a powerful tool against whoever tried to attack them inside their home.
The problem was that because of Solus's regression due to spending centuries without an owner, all the arrays Menadion had imprinted into the tower were gone. Moreover, the tower was far from being completely restored, which limited the number of arrays that could be stored inside the Heart.