Naruto's strongest cheating system

My name is Mo Xuan. I was originally just a high school student, but somehow I came to the world of Naruto. Nima and others are reborn with all kinds of BUFF added to their bodies. Every second in the world, there must be a nine-tailed chakra at the end.

Poor me, although I brought a system, but this cheating system actually requires me to complete the task in order to benefit.

Sneak attack Uchiha Itachi, attack Uchiha Shisui, challenge the third generation of Naruto Sarutobi Hiruzen, dare to cheat again.

Task rewards depend on mood, task difficulty depends on mood, whether or not everything depends on mood, is such a willful system not discounting second-hand defective products?