User blog comment:Chad Pattan/Dear Nubee: It's Time To Clean Up The Cards./@comment-26479160-20150615042413

about 1 year ago it's already common to get UR at first summon. I used to get 2 UR when summoning 10 cards at once, but gradually R cards are increasing and makes the summoning unbalance. Even now getting SR card at first summon is just like miracle to me