Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one tip I always swear by is to have a clear game plan. Whether you’re going for an aggro deck, control deck, or combo deck, make sure every card choice serves your overall strategy. Don’t forget to maintain a good balance between spells, creatures, and lands to ensure you have a smooth mana curve. And lastly, always playtest your deck to see how it performs in different matchups. Happy brewing!