Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one tip I always swear by is to focus on a clear strategy. Whether you’re going for an aggro, control, or combo deck, make sure every card you add works towards that goal. Also, don’t forget the importance of mana curve – having a good balance of low-cost and high-cost spells can make or break your game. And lastly, be open to tweaking your deck after playtesting. Sometimes a small change can make a huge difference in your deck’s performance. Keep brewing those decks and may your opening hand always be in your favor!