The formula can be found on an Alchemist in Skellige. Watch the video below to see the exact location. This is the Master Alchemist and he also has lots of other formulas and rare alchemy items for sale. Rebis is used in a lot of crafting recipes.

You must first complete a quest for this man, if you are under level 22 then you might find it hard to complete. Once you complete the quest then he will teach you some simple formulas that you might have missed while levelling up, such as how to craft White Gull. After this then you will be able to talk to him and buy the formula for Rebis from him.

What are the ingredients for Rebis?

To craft Rebis you need:

Only White Gull is difficult to find, the rest are easily purchased from most alchemists.

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