Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one trick I always keep in mind is to focus on synergy. Make sure your cards work well together and have a clear game plan. Don’t just throw in powerful cards randomly – think about how each card contributes to your overall strategy. Also, don’t forget to consider your mana curve. Having a good balance of low-cost and high-cost spells will help ensure you have plays at every stage of the game. Happy brewing!