Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one trick I always keep in mind is to maintain a good balance between spells and creatures. It’s important to have a mix of both to ensure you have options at every stage of the game. Also, don’t forget to include cards that can disrupt your opponent’s strategy, like counterspells or removal spells. Lastly, always playtest your deck against different archetypes to see how it holds up. Happy brewing!