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. Whether you’re going for an aggressive strategy or aiming for a late-game win, make sure every card in your deck serves that purpose. Also, don’t forget to pay attention to your mana curve – having a good balance of low, mid, and high-cost cards can make or break a game. And finally, never underestimate the power of playtesting! Trying out your deck against different opponents will help you fine-tune it for success. Keep slinging spells and may your opening hand always be full of gas!