Hey fellow Planeswalkers! When it comes to building a winning deck in Magic: The Gathering Arena, it’s all about balance. Make sure you have a good mix of creatures, spells, and lands to ensure you have options at every stage of the game. Consider your mana curve to have a good distribution of low-cost and high-cost spells. Don’t forget to include cards that can deal with a variety of threats your opponent might play. And most importantly, playtest your deck to see how it performs and make adjustments as needed. Happy gaming!