Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, it’s crucial to pay attention to your card choices. Make sure your deck has a good balance of creatures, spells, and other card types to handle different situations. Consider cards that synergize well together to create powerful combos. Don’t forget to include some removal and card draw spells to keep your options open during a match. And most importantly, always playtest your deck to see how it performs and make adjustments accordingly. Happy brewing!