Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, remember to focus on a clear strategy or theme for your deck. Whether you prefer aggro, control, or combo, make sure your cards work well together to support your game plan. Don’t forget to pay attention to your mana curve to ensure you have a good balance of early game plays and late-game power. And always playtest your deck to fine-tune it – sometimes a small tweak can make a big difference! Happy brewing!