The Banoi War Club is a Uncommon unique weapon featured in Dead Island 2 (2023).
Here you can find the main information about the weapon and where to find it.
How to get the Banoi War Club weapon in Dead Island 2:
To unlock the Banoi War Club in Dead Island 2 you need to purchase the Memories of Banoi Pack DLC, which is the Pre-Order Bonus of the game and it is included in the Deluxe and Gold editions of Dead Island 2.
Once in the game, you can claim the Memories of Banoi Pack at the Trader, where you'll be able to buy them for free.