Chuck's nervous activities spiked up the moment he focused his eyesight on the system screen, reading its contents thoroughly. Based on the prompt he saw, the system was giving him an option to absorb the beast crystal, adding its energy to his.
Ever since Chuck forcefully absorbed the energies of the three students that tried to kill him, the thoughts of trying to absorb another person's energy had been lurking in his mind. He tried to suppress it, but it seemed impossible. But the system message made him realize that there was another way to acquire energy, it was a hard, but a morally easier method.
