The wine should be a blend of at least 4 grape varieties with the following restrictions:

"Bikavér", meaning "Bull's Blood" in English, is a red wine blend that holds historical and cultural significance in Hungarian winemaking. Bikavér wines are traditional to the Eger and Szekszárd wine regions of Hungary.

The name "Bull's Blood" originates from a legend associated with the Siege of Eger in the 16th century. According to the legend, the defenders of Eger drank red wine to boost their strength and courage during the battle. The sight of the warriors with red-stained beards and mustaches led the attackers to believe that the defenders were drinking bull's blood to gain supernatural powers. In reality, the red wine they were consuming was likely a robust red blend.

Bikavér wines are typically characterized by a rich, full-bodied profile, deep color, and a blend of various red grape varieties. The exact grape composition can vary between producers and regions, but common grape varieties used in Bikavér blends include Kékfrankos (Blaufränkisch), Kadarka, Cabernet Sauvignon, Merlot, and others.

The winemaking style emphasizes the local terroir and traditions. Bikavér wines are known for their versatility, and producers aim to create well-balanced, age-worthy red blends that showcase the unique characteristics of the Hungarian vineyards.

Regulations and definitions regarding Bikavér wines are differ between the Eger and Szekszárd regions. Both regions have their own traditions and standards for producing this historic Hungarian wine.