There's something about the card slot that I truly don't understand.
Just an example:
Today I wanted to build Zed. No other players had Zed. My game lasted 29 minutes and I saw only one Zed card, so I could not upgrade him. However, 3 enemy players had a two star Lulu and one of them had a three star Lulu.
People tell me the card slot can be empty when others pick it. So why is it possible that Zed does not show up ever again, but Lulu is in the card options tons of times? Shouldn't she be removed from the card slot if she's being picked so many and seemingly easy?
I have seen this a lot and I don't understand how it works. I have had games where 5 players had the same champion in a 2 or 3 star unit but I can't find one champ that no one has?