Six Paths Ten Tails Coffin Seal (六道十尾柩印, Rikudō Jūbi Kyūin)
↓ The top caption says that when it seemed that Madara was making Obito use Rinne Rebirth, Obito was actually weaving the sings for the Six Paths Ten Tails Coffin Seal.
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."
→ The caster condenses and absorbs the ten tailed beasts into himself, awakening ("blossoming") their original power (本来の力, primal power, essential power).
↑ 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.
Madara was able to do easily because of his will power and psychological strength. Not because of the bs kaguya will fanon nonsense that some have been spouting.
