The spell-casting tower was actually more of a magic gathering device. The whole tower was constructed with magical runes around it. Spellcasters only needed to use their own concentration to activate the runes, which would then fire out the readied spells.
High-level spell casting towers could actually wield very powerful magics, but it was regretful that they were short on time and could only erect the simpler towers; even that was only thanks to the engineers working at their maximum pace.
Xiao Lin gently touched the black and glossy metal that the magical guidance unit was made of. The magical guidance unit used magic to hone in on enemies. The principles were all part of third year courses, but Xiao Lin did not need to understand the theory behind it at that moment; he only needed to know how to use it.
