Welp , time to reinstall drivers . <| sep |> How many legendaries should someone expect in 40 packs ? FYI , you can see the breakdown for drop rates by clicking Details on the buy cards screen . The chance of any card being legendary is 1 . 5 % in both Standard and Darkness Evolved packs . Median number of legendaries in 320 cards would be 4 . 8 , but people rerolling would shoot for one or two standard deviations higher than that . I got lucky on my first account didn ' t even know that rerolling was a thing yet with 10 legendaries in 45 or 48 packs that were given at the start at the time as part of the steam release promo , and 9 of them were playables . Were I to go rerolling again , I ' d be very happy to get an outcome like that .