Players can advance to their 2nd job starting at level 60, TM level 50. There is only one option for each character for 2nd class, but players should plan ahead to think about which 3rd job class they want to advance to so they can start preparing. To advance, speak to your job master in Relics Town - Azteca, and they will prompt you to bring a Growth Badge and 3x 100k Galder Checks. The Growth Badge can be obtained from Kaboom in Caballa Relics Dungeon 4, shown below.
He is a mini-boss, one of the few monsters outside of the Classic Bosses, Sentinels, or Raid Bosses to have multiple HP bars, and can be difficult to defeat for new players. Bring some HP/MP potions and you will defeat him to earn a Growth Badge. He drops other badges, one for each class, but don't worry about these since they are from an older system where players needed to collect their class badge specifically. Here, you only need the Growth Badge for any character. The 3x 100k Galder Check are purchased from Andrew in Megalopolis Bank or Relics Town - Azteca. An easy way to make this money is to compound Caballa Coffees using 2x Coffee Beans, 1x Distilled Water, and 1x Empty Potion Bottles. The last 2 are purchased from NPCs and Coffee Beans are dropped by Guineas in Caballa Relics Dungeon 1. Caballa Coffees sell for 60k each to NPCs.