As part of the new Secrets of Gloomrot expansion in V Rising, you'll be able to find new resources like pollen and craft items like Blood Merlot. This new item is essentially a better blood potion but before you can craft it, you'll need to defeat a boss to obtain a blueprint. Here, I'll tell you where to find the boss and blueprint plus what you'll need to craft Blood Merlot.
Where to find the blood merlot blueprint
To get started, you'll need to head to the Brighthaven Vineyards, which can be found in the Silverlight Hills. You'll notice that the important loot for this area is Sacred Grapes, so remember this. You're looking for a boss called Baron du Bouchon the Sommelier and you'll need to defeat this wine connoisseur to get your hands on the Blood Merlot blueprint.
How to craft blood merlot
Once the blueprint is acquired, you'll need to gather 60 Scared Grapes and craft a glass bottle—can't just be throwing grapes around. You can get grapes from barrels and vines in the Brighthaven Vineyards, though keep an eye out for harpies as they will attack you because they are also after some grapes.
After you've collected 60 Sacred Grapes and your glass bottle you can make the Blood Merlot. It can be given to abducted people and lets you tap a prisoner, costing you 25-50% health. It'll also increase misery by 3-15% at a time.
You can also get the Blood Merlot amulet after defeating the baron and wearing it will boost your spell power +23 and a +15% reduced blood drain rate.