Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, I always make sure to have a good balance of creatures, spells, and lands. It’s important to have a clear strategy in mind before you start selecting cards for your deck. Think about whether you want to focus on a specific mechanic or win condition, and build your deck around that. Don’t forget to include some removal spells and ways to deal with different types of threats. And always playtest your deck to see how it performs against different strategies. Happy brewing!