1 a week is completely possible without spending MC or gems. 14 banners per week from set which leaves 11. You can pull them from the events and although rare if you are grinding it all week you should pull a few. The weekly event has a decent chance of pulling though and I think I pulled 5 out of my ten tries...I get it that rng was probably generous to me and some folks only got 1 or none, but it is completely doable to get 25 if you grind the events all week...just have to work on it.
1 a week is completely possible without spending MC or gems. 14 banners per week from set which leaves 11. You can pull them from the events and although rare if you are grinding it all week you should pull a few. The weekly event has a decent chance of pulling though and I think I pulled 5 out of my ten tries...I get it that rng was probably generous to me and some folks only got 1 or none, but it is completely doable to get 25 if you grind the events all week...just have to work on it.