Hey fellow Planeswalkers! When it comes to deck building in Magic: The Gathering Arena, I always start by defining my strategy or win condition. Whether you prefer aggro, control, or combo decks, knowing how you want to win is key. Next, focus on consistency by including playsets of key cards. This will increase your chances of drawing what you need when you need it. Don’t forget to include a good mana curve to ensure you can play your cards on curve. Lastly, always playtest your deck and make adjustments based on how it performs. Happy deck building!