Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, I always start by focusing on a specific strategy or win condition. Whether you prefer aggro, control, or combo decks, make sure your cards work together towards a common goal. Don’t forget to include some removal spells and card draw to keep your options open during the game. And always playtest your deck to fine-tune it based on how it performs in actual matches. Good luck, and may your opening hand always have the perfect curve!