Enma bō

The Enma Bō was a tool created by Orochimaru using the body of Monkey King Deva. Enma Bō was the name given as it was initially thought that the bo was made from Deva's younger sibling, Enma. This mistake was also made by the monkey god Roen.

Deva's body was much harder than Enma's and as such the staff is more durable, it's strength can be further enhanced with Kosaru's Steel Release Chakra.

The bo is sentient in how it can communicate with its wielder and even return to them as long as its wielder can sense its chakra. Kosaru says this communication feels almost like a sixth sense is speaking to you.