My Best End of Season Rewards Yet!!!

Just finished the season with my highest ranking yet from Bronze League II to Silver League III! The power for Silver League III was pretty crazy! 15K! But the reward of 12 chests seemed worth it in the end to me as I'm still new to the game and I want to collect as many chests as possible. Though it did cost around $1.75ish to rent enough cards in order to reach the 15k power mark. Now the real question of should I start purchasing cards and collecting my own power instead of relying on rented cards comes into play. Maybe I should just stay in bronze league for some time until I grow more first of all, since the power requirement is significantly less? Any thoughts?

I received my first rare card with this end of season rewards! I've gotten some common cards previously, but didn't know I could get a rare one. I was shocked! It's nice to collect some more potion charges too. Hopefully one day I'll own some packs to use them. I wonder if one day you can sell the charges? If you can, please let me know! How were yalls end of season rewards?

Below is the full 12 chest EOS rewards for Silver League III