With the quest we got a potion, nothing special but they come in handy with the daily pack opening.
Are those (alchemy and legendary potion charges) really helping in card pack openings? Not as if I could afford regular card pack opening (1 Voucher + $4 USD per pack). I am just/only asking out of curiosity.
The reg packs are only $4 but around $3 on tribaldex, I find they may not always help but they are the way to get over 2 rares. I always use them as it is only extra $0.5 cents at most a pack.