Hello everyone,
I understand the frustration you feel, however if you wish to report a bug, any kind of evidence would be needed.
This situation would require a video of pulling in a treasure to show that indeed, rare ninjas do not appear.
That being said, the fact that those do not appear may be caused by bad luck. I'm not saying this particular situation is 100% luck's fault, just giving it as a possibility.
Hello again,
Please refer to the following thread for this issue:
https://forum-narutoen.oasgames.com/page/show-post-22723-1.html
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