Hey fellow Planeswalkers! When building a deck on Magic: The Gathering Arena, always start with a clear strategy in mind. Focus on a specific win condition and choose cards that support that goal. Remember to maintain a good balance between creatures, spells, and lands to ensure consistency in your draws. Don’t forget to regularly review and refine your deck based on how it performs in matches. And most importantly, have fun experimenting with different card combinations to keep the game exciting! Good luck on the battlefield!