Omega Stone

The Omega Stone (石Ω, Ishi Omega) was an item discovered by Yasaki Hatake during his travels with his occasional teacher, Shinzui Uchiha. While in the Land of Fangs, observing the, Yasaki spotted the stone with his Sharingan. The stone had a distinctive chakra, akin to how someone's chakra appears when they are under the effects of genjutsu. Amazed at the object lodged in the bone, Yasaki took it from the bone, and later made it into a necklace. At the very moment Yasaki laid hands on it, the jewel integrated into Yasaki's inner being, forever connecting the two.

Appearance
The Omega Stone is an oddly shaped relic that looks similar to an egg. It is blood-colored and smooth.

Effects/Abilities
During a battle against rogue shinobi in the Land of Fangs, Shinzui offered to fight them off, however, Yasaki insisted that he fight them, saying that something wanted him to fight. A certain desire awakened in him at the time, and with brutality never before seen in a child, Yasaki slaughtered the group of shinobi in mere seconds. Mangled bodies remained after the vicious attack. Yasaki claimed that he couldn't remember what he had done, and was quite horrified to see what he caused. Shinzui immediately blamed the Stone, and Yasaki was willing to dispose of it, however, it wouldn't leave him, it's essence having been permanently linked with him. It can be said that the Stone activates killer instincts within someone, and even gives the user incredible healing properties. The user of the stone even had the brief ability of invisibility. When the stone itself is targeted, a sealing technique is activated automatically, encasing the user in an indestructible stone.