Tailed Beast Ball: Combined Tailed Beast Ball - a combined technique in which several tailed beasts or their jinchuriki simultaneously form their own Tailed Beast Balls and merge them into one. The result is a clump of chakra of colossal size and power, far surpassing a single ball. It requires a high degree of cooperation between participants, as each must maintain the balance of positive and negative chakra in an 8:2 ratio and synchronize the release of chakra. The technique was used, in particular, by Kurama and Gyuki, as well as Naruto Uzumaki together with Killer B or Minato Namikaze. And by a group of Biju under Obito's control.