TL;DR: Subclasses let one character run multiple classes โ€” take up to 3, level them from 40, and switch roles (DD, tank, support) without rerolling. The real payoff is subclass certificates: permanent passive bonuses to your main class. Reprofiling is a custom class change that swaps a class without losing levels.

Overview

A subclass gives your character a second (or third, or fourth) class. You can add up to 3 subclasses, and you switch between them through a Grand Master NPC. With subclasses you can flip your role โ€” DD, tank, support โ€” without ever creating a new character.

Restrictions

You cannot take a subclass from the same development tree as your main class. If your main is a Dark Avenger, Paladin is locked. Human and Elf classes are open to each other as subclasses, while Orcs and Dwarves come with their own restrictions.

RuleHow it works
Starting levelEvery subclass begins at level 40 and levels independently.
Progress storedWhen you switch at a Grand Master, each subclass keeps its own level, skills and XP.
GearEquipment is tied to your active class โ€” swap classes and incompatible gear comes off.
Subclass skillsYou use subclass skills on your main through certificates (see below).

Subclass Certificates

Level a subclass to 65+ and you can claim a certificate โ€” a special skill that works on your main class. Certificates are issued by an NPC in Ivory Tower.

CertificateRequirementWhat it grants
EmergencySubclass level 65+Basic passive bonuses.
MasterSubclass level 70+Improved stat bonuses.
TransformationSubclass level 75+Subclass transformations.

Certificates are the main reason to level subclasses at all. They give your main class permanent passive bonuses โ€” HP, MP, speed and resistances. With three fully developed subclasses, your character becomes significantly stronger.

Class Change (Reprofiling)

Reprofiling (class change) is a custom mechanic that lets you swap your main or extra class without losing levels. Classic Lineage 2 has no such option. Reprofiling costs resources โ€” Adena and special items โ€” and the exact terms depend on the server.

This is your chance to fix a class pick you regret or try out a different role. When you reprofile, the skills of your old class are lost and you study the new class's skills instead; incompatible gear is unequipped. Reprofiling is especially valuable when you want to change role while keeping all of your progress.