What was the ability of Red Pupil,[The Actor of Muyin City] and [Yang Yan]? what's meaning

The red pupil ability of the two novel characters," The Actor of the City of Muyin " and " Yang Yan ", meant that their eyes contained elements that could absorb light and convert it into energy. In other words, the " Mega-hidden City " in the " Executor of Mega-hidden City " referred to the ability to convert light into energy, while the " Sun Flame " referred to the ability to convert heat into energy. The red pupil ability of these two characters played an important role in the novel, helping them carry out various dangerous tasks such as absorbing light to create flames, absorbing heat to create flames, and so on. This ability also allowed them to better conceal themselves when facing enemies, and it also gave them a certain combat advantage.