Greater blue mutagens are used to augment abilities and are more effective than their lesser and regular counterparts. When placed in the diamond-shaped slot in the character panel, they give +10% to sign intensity, which increases by 10 up to a max of +40% if all 3 skills attached to it are blue.
Blood and Wine expansion
Blood and Wine expansion 
Edit
With Blood and Wine, the player can now craft these with other ingredients that don't include blue mutagens.
| Ingredient | Amount |
|---|---|
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1 | |
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1 | |
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1 | |
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1 | |
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1 |
| Ingredient | Amount |
|---|---|
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1 | |
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1 | |
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1 | |
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2 | |
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2 |
