Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, it’s important to have a clear strategy in mind. Start by choosing a win condition and then build your deck around it. Make sure to have a good balance between creatures, spells, and other cards to support your strategy. Don’t forget to include some removal and card draw cards to handle different situations. And always playtest your deck to see how it performs and make adjustments accordingly. Happy deck-building!