Wondrous Magus appears in the upper half of the second section of the Tziah Block within Tartarus, between floors 151 to 163. In battle, they may waste turns trying to cast Matarukaja on themselves after one has already cast it. They are also the subject of one of Elizabeth's Requests, and they will drop Gold Rings while the quest is active. Returning to Elizabeth with 3 Gold Rings will complete the quest. It later reappears as a boss on the 8th floor of Ptolomea alongside the Cowardly Maya and the Crying Table.
Wondrous Magus appears in the 9th and 10th halls of the Steamy Bathhouse within the Midnight Channel. They will continuosly bombard the party with their magic attacks. Wondrous Magus has no weaknesses to exploit, but using Chie's Skull Cracker and Yosuke's Tentarafoo skill will incapacitate them for several turns and keep them from attacking the party (although they may smack each other for minimal damage). Upon being defeated, Wondrous Magus may drop the Smooth Fabric material. Selling 10 of these at Daidara will unlock the Hard Bolero female armor in the shop.
Wondrous Magus appears in Act 5 of Hikari. It attacks with single-target Psychokinetic, Nuclear, and Bless skills. When defeated, it may drop Magus Gem and Magus Chalice. Magus Gem is used to create the Neutron Saber for Akechi, the Hydravenom Bow for Yukari, Vidar’s Boots for Chie, and the Fickle Madam for Yukiko. Magus Chalice is used to create Hercules’ Club for Ryuji, the Dangerous Claw for Teddie, and the Magical Gun for Naoto.