I was thinking that how can I reach to the champions league without spending tons of money to buy cards ,. The answer is simple l just need to level up two of my frequently used team and also level up some important neutral cards . I don't know how much money it cost but one thing I know that the game got really complex with new reward cards, new summoners etc. With leveling only two of my team and some neutral cards I can join to tournaments, reach easily champions league get more reward cards with resetting daily quest. It's hard to do daily quests with two team but you have opportunity to reach champions league but it really costs a lot of money to max out even just one team.