When you have reached level 30 with your MS Thief you get to specialize in a certain class. This is known as a job advancement. When you’re at level 30 and are ready for your job advancement, simply return to Dark Lord. He’ll send you on a quest and if you succeed you’ll be able to start your new job. You can visit him again at level 70 and again at level 120 for your final job advancement.

The Maple Story Thief class gets to choose an Assassin, Bandit, or Dual Blade career.
You can view Maple Story Walkthroughs for guidance and detailed information about each one of these classes
Assassin: Ranged attackers that specialize in metal claws and throwing stars. They strike from afar and are agile, quick, and can attack while in the air. The downside is that they are fragile.

Some Assassin Skills
•Claw Booster
•Claw Mastery
•Luck Seven

Bandit:
Dagger carrying up-close damage dealers. Although their attacks don’t do much damage, the MS Bandits are so quick that they can strike multiple times before their enemy will realize what’s happening.

Some Bandit Skills
•Dagger Mastery
•Double Stab
•Savage Blow

Dual Blade:
Fast, stabbing, slashing, and assassination skills. MS Dual Blades are the most similar to the traditional Thief class. They also have unique skills and have their own Cash Item inventory

Some Dual Blade Skills
•Claw Booster
•Mirror Image
•Triple Stab

:c I haz no picture