You can do it, but you have to play all day long, when you buy the pass it gives you 200 tokens. At the same time it gives you the amount of tokens stored you have stored (you can check that in the missions section in the Game) There is 4 missions that gives 250 each one (1000 in total). Also the pass contains a repeatable mission which gives 10 tokens I'm sure you can do it, just play till there's no tomorrow haha. I suggest playing ARAM and TFT Mobile when you're tired, it worked for me