Hey fellow Planeswalkers! When building a deck in Magic: The Gathering Arena, always start with a clear strategy in mind. Choose cards that work well together and support your game plan. Don’t forget to have a good balance of creature spells, instant spells, and sorcery spells. And always remember to keep your mana curve in check to ensure you can play your cards efficiently. Happy deck building! May your opening hand always have the perfect mix of lands and spells.