"I don't see any signs of magic stones in the spears, so I wonder how they were produced to be able to attack with lightning bolts once they are infused with mana," Sigma thought while checking the spears and trying to sense any high concentration of mana on them and then failing.
After a few hours, Sigma confirmed that those creatures weren't going to move from their spot unless something happened, and he could say the same thing about the people inside the tower. He could see some light through the windows, and those didn't vanish at all in several hours. They were doing a poor job monitoring the cells in their territory…
In any case, Sigma didn't make much progress with his training, and he didn't want to say that it was because he was multitasking but because it was really difficult to control a weapon with something like Telekinesis. Using elemental Manipulation was a lot easier, but it probably will consume more mana…