Senju Shinobi dies during the third Shinobi war and gets reincarnated as itama senju in the warring clans era with the skills Copy and devour. Also since it's his own skills he can't be controlled by the skills 
Copy: A copying ability that allows user to copy whole living or dead bodies and inorganic objects. The copied objects or copied people also completely copies all the abilities of the objects or people that was copied including chakra 
Devour: A ability that allows user to create a small black hole from there hand and just needs a small amount to absorb anything to gain its abilities, skills, techniques, appearance and chakra

It happened on a misty morning. Itama was part of a small diplomatic envoy to a minor clan, a mission deemed safe. History repeated itself with cruel irony. They were ambushed by a radical Uchiha faction opposed to any talk of peace. The fight was swift and brutal.


Itama fought not with the full might of his powers, but as Senju Itama should: with skill, with intelligence, using copied taijutsu styles and basic nature transformations. He defended his comrades fiercely. He saw the moment coming—an Uchiha spearman, fast and precise, breaking through his guard.


Chapter 32 - The Ambush