Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, remember to focus on a clear win condition for your deck. Whether it’s overwhelming your opponent with a horde of creatures or pulling off a powerful combo, having a clear goal will help you streamline your card choices. Also, don’t forget to pay attention to your mana curve to ensure you have a good balance of low-cost and high-cost spells. And lastly, always playtest your deck to see how it performs and make adjustments accordingly. Happy brewing!