Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one key strategy is to maintain a good balance between your mana curve and card synergies. Make sure to include a mix of low-cost and high-cost cards to have options at every stage of the game. Also, focus on building around a central theme or strategy to maximize synergies among your cards. Don’t forget to regularly review and tweak your deck based on your gameplay experience to keep it competitive. Keep brewing those decks and may your opening hand always be in your favor!