This article, Tengai Shinsei, contains content taken directly from our mother site. All credit of such content is reserved the original authors over at Narutopedia, the original article can be read here: "Tengai Shinsei".
Madara Uchiha weaves three hand seals simultaneously, by doing so in conjunction with his Susanoo, in order to draw massive Meteorite meteorites from the upper atmosphere down towards a specific location on the ground. As they descend in succession along the same trajectory, if one of these meteorites is stopped, another collides with the first like an enormous hammer, breaking both apart and ensuring that they crash into their intended destination.
The impact of this technique was of such enormity that it devastated a significant portion of Gaara's Fourth Division when used against them, with the resulting tremors being so great, they could be felt as far away as the Allied Shinobi Forces' HQ.