MuseElf_DarkWizard_DarkKnight

public class MuseElf extends Elf {
    public MuseElf(String username, int level) {
        super(username, level);
    }
}

=========================================================

public class DarkWizard extends Wizard {
    public DarkWizard(String username, int level) {
        super(username, level);
    }
}

=========================================================

public class DarkKnight extends Knight {
    public DarkKnight(String username, int level) {
        super(username, level);
    }
}