The tip below many use to be able more chests, so always have a management of your DEC.
To increase power at the beginning many have difficulties because the drop of cards are difficult so the easiest way to gain more cards would be in the daily mission, but it would be more affordable for you to RENT CARDS with higher LEVEL for LOWEST PRICE.
Below are some examples of cards I buy to raise the POWER and earn more chests up to the SILVER 3 rank.
SILVER 3 = 12 chests x 2 seasons // TOTAL: 24 chests
Daily mission: 1 bau x 30 days // TOTAL= 30 chests
For me to increase my power up to SILVER 3 I always look for low priced and high level rented cards.
I usually spend around 40 dec to have 15 thousand of power.
TIP: HIGH LEVEL FOR LOW PRICE
This letter I paid 14 DEC and it gave me 14,400 POWER
Remembering that you can find cheaper cards that give you more power, so always do a search
