Talk:Champion Challenge!/@comment-32350744-20180131105707/@comment-34017182-20180131143536

I think that is the Murphy's Law of OPTC: "You rarely get what you want/need!". On top of some bad rates you get bad "luck" (rumored algorithms from Bandai).

When you do get one, you can check the rarity of the book in your character box. Manuals range from 3* to 6* so that will likely affect the drop rate.