Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, it’s all about finding the right balance between creatures, spells, and lands. Make sure your deck has a clear strategy, whether it’s aggro, control, or combo. Don’t forget to include cards that can deal with a variety of threats. And always playtest your deck to see how it performs against different matchups. Remember, the key to success is understanding your deck inside and out! Good luck, and may your opening hand always be full of gas!