Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, remember to have a clear strategy in mind. Focus on a particular theme or win condition to streamline your deck. Make sure to include a good balance of creatures, spells, and lands to ensure consistency. Don’t forget to regularly test your deck and make adjustments based on how it performs in matches. And most importantly, have fun experimenting with different cards and strategies to find what works best for you! Good luck out there on the battlefield!