barbarian level up item

[Jurkal]

Is there an item got a barbarian can use to increase their levels like sorcere and fighters

[lemeres]

Their levels for...what?

Effective level of a rage power? Rage rounds?

And the thing you are referencing... with sorcerers, is it that one robe that increases their effective level for bloodline powers? And...no idea what the fighter one is supposed to be.