Joko's Ninja Exchange rewards!

It's basically 60 atk for 8 minutes, compare it to onyx apples [100 atk for 10 minutes] and you understand why people don't consider it worth the time hunting 50 badges...

1 minute, but at the rate they dropped in the original Mansion release last year, they were still fun. You couldn't have decent damage w/o someone accusing you of using one.