Blessing of the Peacock Wisdom Queen

Blessing of the Peacock Wisdom Queen (孔雀明王の恵, Kujaku Myōō no Megumi) is a unique body modification granted to Zenjou by the Peacock Wisdom Queen, the leader of all Peafowls. A being of extraordinary nobility, it is said that she represents all that is royal. And such a benevolent queen loved by all. When she finds one capable of spreading her word, she blesses them with a feather from her own tail. However, a single feather from her train is a thousand feathered tail. Meaning her true number of feathers are uncountable. Zenjou is perhaps the first and only shinobi to possess such a blessing. Granting him a tail which grows from his tailbone. The tail possesses various traits. Physically, it is one with a thousand feathers, each possessing a single eyespot. His tail is capable of extending to unknown lengths utilizing chakra and hardening to levels rivaling metal. Making it a valuable weapon and shield in battle. Zenjou can also position his tail so it allows him to glide far distances as well as float when high above earth. Also, streaming chakra through his tail also allows him to launch feathers like sharp projectiles capable of cutting rock. His feathers regenerate as quick as his own healing factor.

A feature which was discovered as a Jōnin is his connection to the Ryūmyaku. An ancient power source, one of which is responsible for pumping ancient energy into the Dragon Veins. His tail forms a bridge between the earth and his body. And during hand seals, he is able to stream energy from the Dragon Veins, which enhances his own techniques. By doing so, Zenjou can perform long lasting techniques that last longer. The main purpose involves creating a secondary energy source. Zenjou's techniques no longer rely on his own reserves to power themselves, although he contains his natural control over it. Instead, the energy beneath the earth supplies his techniques with the necessary chakra. Even enhancing it further. Doing so allows him access to larger, consecutive chakra taxing abilities.

Trivia

 * Thanks Kaze for idea.