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The Nomadic Warrior's Cookbook 3 is one of the many Key Items found throughout Elden Ring, sold by the Saintsbridge Nomadic Merchant in East Limgrave.
The Nomadic Warrior's Cookbook 3 is a Key Item Recipe Book that will unlock extra crafting recipes once you have obtained it.
This includes the following recipes:
Purchased From: Nomadic Merchant in the Mistwood region of East Limgrave, just past the Saintsbridge for 500 Runes.