False Weakling, True PowerEP 30

The Aurellian Empire hosts a martial tournament to find Princess Isolde a husband, drawing fierce mages from the Northern Kingdoms to challenge the realm. When a Northern rogue wreaks havoc on the streets, a mysterious god-tier spell instantly vaporizes him. Investigating the high nobility for this hidden protector, Aurelian's First Mage, Kael, is shocked to discover the true master is Lucien, the very man everyone ridiculed as a worthless nobody.