Job change from Mage to Wizard. To start the trials you need a Mage at job level 40+ with no unspent skill points. Everything happens atop the tower in Geffen: Catherine takes your application, and the gloomy examiner Raulel tests your knowledge and combat skill. The trial has three parts — gathering magic items, a written exam, and a practical battle through three elemental rooms. If you are job level 50, you skip one of the parts.
Wizard Guildsman, gef_tower 111,37). She only accepts a Mage at job level 40 or higher with no unspent skill points.
Red Gemstone, 
Blue Gemstone and 
Yellow Gemstone, or 5 each of 
Crystal Blue, 
Green Live, 
Red Blood and 
Wind of Verdure. Collect exactly the set you were given and return to her.
Gloomy Wizard, gef_tower 102,24). He runs a written exam of 10 questions about magic, monsters and Mages. You need at least 8 correct to pass.
Apple Juice (the library in Prontera for monsters, your own experience for Mage questions), and you may retake the test.
Worn Out Scroll and he will count the final trial in place of the fight.