if you need more power then yes is worth , you get meduim refine , and mood scrolls ...etc , if you want to get masked man then no , it's better to you to collect more coupons if you want masked man and wait a better event to get him , and good luck

the first first one was like this

1 Tobirama Senju fragment

Coins , M.refine, M.attack , B,refine

and was unloved event in this time , because those rewards was not good :|