Reach the indicated level in one of the following classes to get the corresponding weapon discipline for your custom character:

Chinese Blade: Level 1 Sage
Chinese Sword: Level 1 Pirate, level 20 Assassin
Dagger: Level 1 Thief, level 10 Saint
Grieve Edge: Level 10 Barbarian, level 20 Monk, level 20 Dancer, level 20 Gladiator
Iron Sword: Level 1 Barbarian, level 10 Assassin, level 20 Pirate
Katana: Level 1 Samurai
Katana and Shuriken: Level 10 Ninja, level 10 Samurai, level 10 Knight
Kunai: Level 1 Ninja, level 10 Sage
Lance: Level 1 Knight
Nunchaku: Level 1 Monk
Sickle: Level 20 Thief, level 20 Ninja, level 20 Samurai
Soul Of Cervantes and Soul Of Ivy: Level 30 Pirate
Soul Of Lizardman and Soul Of Tira: Level 30 Assassin
Soul Of Maxi and Soul Of Kilik: Level 30 Monk
Soul Of Nightmare and Soul Of Astaroth: Level 30 Barbarian
Soul Of Rock and Soul Of Seong Mi-Na: Level 30 Gladiator
Soul Of Siegfried and Soul Of Raphael: Level 30 Knight
Soul Of Sophitia and Soul Of Cassandra: Level 30 Sage
Soul Of Taki and Soul Of Setsuka: Level 30 Ninja
Soul Of Xianghua and Soul Of Voldo: Level 30 Dancer
Soul Of Yoshimitsu and Soul Of Mitsurugi: Level 30 Samurai
Soul Of Yun-Seong and Soul Of Tira: Level 30 Thief
Soul Of Zasalamel and Soul Of Talim: Level 30 Saint
Staff: Level 1 Saint, Level 10 Monk, Level 20 Sage
Steel Fan: Level 10 Dancer, Level 20 Saint
Sword and Shield: Level 1 Gladiator
Tambourine: Level 1 Dancer
Wave Sword: Level 1 Assassin, level 10 Thief, level 10 Gladiator, level 20 Barbarian