Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one trick I swear by is to always have a clear game plan in mind. Whether you’re going for aggro, control, or combo, make sure every card in your deck serves that strategy. Don’t fall into the trap of trying to fit in too many cool cards that don’t synergize well – focus is key! Also, don’t forget to regularly check your mana curve to ensure you have a good balance of low-cost and high-cost spells. Happy brewing!