Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, remember to focus on synergy between your cards. Try to build around a specific theme or strategy to make your deck more consistent and powerful. Don’t forget to include a good mix of creatures, spells, and lands to ensure you have a balanced deck. And always playtest your deck to see how it performs and make adjustments accordingly. Happy brewing and may your opening hand always be full of powerful plays!