Talk:Construction/@comment-24253832-20131213071227/@comment-1482018-20131216031503

It's a little luck based...(of course, the entire game is luck based) chance of dropping Ooi seems to be roughly 1 in 20~35 runs. Shimakaze, 1 in 40~50 runs. This may vary for players, but that's about the chance from what I've tested.