3:
class:

Barbarian

features:
level:

3

subclass:

Berserker

6:
class:

Barbarian

features:
level:

6

subclass:

Berserker

10:
class:

Barbarian

features:
level:

10

subclass:

Berserker

14:
class:

Barbarian

features:
level:

14

subclass:

Berserker