That reanimated treasure is a trap. As mentionned in other posts, the grind for the rare ninjas in that treasuer will be much harsher and those ninjas end up being mostly novelty ninjas that bring nothing new to the table. Most Kage ninjas are much better than what you will get from that new chest. Take Mu for example the second tsuchikage, what is he but a fancy Sage Naruto with slight differences. If you compare the two, Sage Naruto has more value and is far easier to get. I will not *yze every ninja in that chest, but any in depth review will say the same as me, these ninjas arent worth so many seal scrolls, if you are looking for efficiency.