Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, I always start by focusing on a specific strategy or theme. Whether it’s aggro, control, or combo, having a clear game plan will help you choose the right cards for your deck. Don’t forget to pay attention to your mana curve to ensure you have a good balance of early game plays and late-game threats. And always playtest your deck to see how it performs in different matchups. Remember, adaptability is key in the ever-changing world of Magic! Good luck out there on the battlefield!