Eight-Tailed Ox Menacing Ball

After Killer Bee fully transforms into the Eight-Tailed Giant Ox, he gathers vast amounts of chakra at his mouth in the form of a black sphere. He then launches it at his targets as a giant wave. When he used this technique against Taka, the resulting explosion was large enough to devastate the entire Valley of Clouds and Lightning. The Eight-Tails mentions it's very similar to throwing up.