This is the first time that I managed to get to Gold 1 at end of season primarily due to collection power requirements. The influx of Chaos Legion cards has allowed me to jump out of the Silver league.
Gold 1 gave me 30 chests with the following rewards.
That collectively game me the following:
DEC: 5941
Potions: 2 x Alchemy Potions and 2 x Legendary Potions
Cards: 14 x Commons and 2 x Rares