Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, a key tip is to focus on a clear game plan. Whether you’re going for an aggro, control, or combo deck, make sure every card choice serves your overall strategy. Also, don’t forget to fine-tune your mana curve to ensure you have the right balance of early game plays and late-game power. And always playtest your deck to see how it performs in different matchups before making final adjustments. Happy brewing!