Gold - Magic Arena

 https://gamersdecide.com/articles/mtg-arena-best-way-to-spend-gold

• The fastest way to make Gold is by completing daily quests and daily wins.
   
  •  Quests can reward you with 500-750 gold for each completion.
     
  • You get one new quest per day at 2am PST.
     
  • If a Quests says you have to "cast a Blue or Black spell" then you can cast a card with Blue and Black in the cost (like Thought Erasure) and that will count twice for the Quest. 
     
• If your quests are only giving you 500 gold, you can reroll your quests for a chance at getting a 750 gold quest.

• If you’re looking to get as many cards as you can, then the best way to spend Gold is to spend 5000 Gold to enter a Draft.
   
  • Boosters will usually give you 8 cards for 1000 Gold. But when you draft, at the minimum, you’ll get 3 boosters with 14 cards in them, 1 booster with 8 cards, and at least 50 gems. If you get more wins, then you’ll get better rewards.
     
  • As a comparison, buying 5000 Gold of Booster packs will give you 40 cards, while buying into a Draft at minimum will give you 50 cards in total.
     
• If you’re looking for specific cards, or you just want more wild cards, you’ll want to spend the 1000 gold on Booster packs. While Draft gives you more cards, opening Booster Packs can give you Wild Cards and also raise the Wild Card tracks more for you.