Hey there, fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, always remember to have a clear strategy in mind. Whether you’re going for aggro, control, or combo, make sure every card in your deck serves a purpose towards that strategy. Also, 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 lastly, don’t be afraid to experiment and tweak your deck based on the current meta. Happy brewing!