Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, always remember to pay attention to your mana curve. Having a good balance of low-cost and high-cost cards will help ensure you have plays at every stage of the game. Don’t forget the importance of card advantage too – including cards that draw you more cards or provide other advantages can be game-changing. And lastly, always be on the lookout for powerful synergies between cards that can give you the upper hand in battles. Happy deck-building!