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The Ancient Dragon Apostle's Cookbook 2 is one of the many Key Items found throughout Elden Ring, sold by the Forest-spanning Greatbridge Nomadic Merchant in the Altus Plateau.
The Ancient Dragon Apostle's Cookbook 2 is a Key Item Recipe Book that will unlock extra crafting recipes once you have obtained it.
This includes the following recipes:
This item can be bought from a Nomadic Merchant who lives at the southern side of the forest-spanning Greatbridge near the Minor Erdtree in the Altus Plateau. It can be bought for 4,500 Runes.