Yeah, that "Limited Cards" are the "Time-Limited Treasures" .. If happens that you have a crappy connection, and entered the "Recruit" interface, you will see a icon above which has a German Language and the icon looks like a Hour Glass .. That's what it is ..

Tho in our case here in English Server, we will not know if Oasis will release that Time-Limited Treasures where we can get the Edo Jinchurikis like Edo Han and Edo Fu which i like to have and Edo yagura and Edo Roshi .. If they will * to their habit of releasing things to gain more income then it would be possible that all Edo Jinchurikis will be only available thru RNG events or Recharge/Rebate Events only which i hope will not happen ..

From what i saw in videos, it is around 190 to 210 seals per super rare .. Every Edo Jinchuriki Treasure also includes 2 Rares from the Permanent Treasures like Mei Terumi, Kazekage Gaara, Utakata and other more ..

I already seen many players using him in Arena, both Ranked and Training and they are using Roshi[Edo Tensei] with just other non-jinchuriki ninjas .. But some of them are using him with Kushina[Red Hot-Blooded Habanero] .. base on what i saw, i think i'm gonna agree with you, the original Roshi is stronger than this Edo Tensei form, since the original Roshi has Def/Nin scaling .. I think he will have a better use when the other Edo Tensei Jinchuriki comes, like Edo Han and Edo Yagura, Edo Fu is Barrier Ninja too i think ..

Anyways, Congrats to all who gets the new Roshi ..