Nahir led Malek, Noir, and even their captive Layla to the underground where Achim was.
During the discussion they had before Layla's arrival, Achim proposed to create an Array formation with a defensive formula. He wanted to hide the formation inside the hidden chamber beneath the fort.
Because Somulians could not replicate lost technology, Achim was not confident he could pull it off. However, he wanted to try it out because, based on some knowledge he received from their Master after being reborn, one could create lost technology— or, rather, Arrays— as long as one had the required materials and magic energy to sustain it.
Unfortunately, the Array formation with the defensive formula Achim remembered was quite troublesome to set.
