...Kekkei Genkai/Ninjutsu used by Obito and Madara. Taking the ten bodies of the tailed beasts into oneself, becoming a Jinchūriki and gaining their power. It goes on to say that it's difficult to control the tailed beasts and that this can cause the user to have a psychological collapse, and needs to either have a suitably strong force of will, either inherently or by finding one, in order to gain control. If they do that, they'll obtain the terrifying/astounding power of a "god that shapes the land."
To acquire the power of the ten tailed beasts is the same as possessing the power of the Sage of Six Paths, so it is accompanied by the same Truthseeker Orbs.