Tower of Yearning

After she heard he was a rune master, Ruby became a lot friendlier compared to before. They agreed on a design and started talking about runes. 

Arthur offered some of the runes he knew how to inscribe and she was captivated. As she had said, Telekinesis and Compress would make an excellent combination with technology. The two thought of possible uses before, as if waking up from a trance, Ruby got back to her work and shooed him away. 

Leaving her to her work, Ivy and Arthur left the underground floor. Ivy mentioned something about a task Sier asked her to do, and she disappeared as well after dropping Arthur at Idris's office.

Arthur decided on a place to breakthrough. A place that was filled with runes and a mana-rich place. It was also the place where he was the safest from harm, his fortress.