As I understand it, four players can each be holding a fistful of rings. Does he get a boost from all of them? He seems much more powerful than the Matriarch.
Kitsu Warrior
I would agree that he is more powerful, but I think you only count your own rings for his abilty.
Then again, I also think he was released since the last multiplayer rules update, so hasn't been specifically ruled on.
QuoteRings and Card/Game Effects
When a card or game effect refers to one or more claimed or unclaimed rings, it only refers to the ring or rings in the unclaimed ring pool or on the provinces of the controller of the card effect, or by the player resolving the game effect. This rule does not apply to cards that specifically call out or only interact with rings in an opponent’s claimed ring pool.
Here's the relevant multiplayer rule. Kitsu Warrior doesn't fall into the exception, only the controller's rings count for the boost.
Ah... well that takes him from overpowered to just... powerful!
It's good to see the card gain a purpose, even if only in Enlightment mode.