During this period, Reiger, though nearly forsaking sleep and food in his exploration of the underground city, had not forgotten that he possessed the magic of the "Omnipotent."
Having learned Ais's "Wind Spirit Swift Walk" and Rephia's "Arc-shaped Beam," Reiger had, based on practicality and various considerations, learned many spells from others.
There's no need to go into detail about Rephia. As Reiger's teammate and companion in the underground city for over a month, aside from the overlapping "Elf Ring," Reiger unsurprisingly learned her last type of magic.
As the strongest Magic Guide of the region, Revilia possessed nine kinds of magic. Naturally, Reiger did not miss out on learning from her, humbly seeking guidance when she was available, and ultimately learning five types of her spells.
Besides that, Reiger also learned a powerful spell from Finn, which could serve as a trump card in adversities to turn the tables.