Hey fellow Planeswalkers! When building your deck in Magic: The Gathering Arena, remember to focus on a specific strategy or theme to keep your cards synergistic. Make sure to have a good balance of creatures, spells, and lands in your deck to ensure you can cast your spells efficiently. Don’t forget to include some removal and card draw to handle various situations during the game. And most importantly, playtest your deck to see how it performs and make adjustments accordingly. Happy deck-building!