My Splinterland's Season End Rewards

I am always excited for season end in Splinterlands. I am in the lower league so I don't get much but I sometimes get good cards from it. Recently, I have been getting more credits and potions from the daily quest and I actually do not know how to use them. I was hoping I could get all cards in the season end. I actually just got 1 but it's a rare and I am already happy with that. I think what I got is something I could use in my death deck.