Hey fellow planeswalkers! When building a deck in Magic: The Gathering Arena, always start with a clear strategy in mind. Decide if you want to focus on aggro, control, or combo. Make sure to include a good mix of spells, creatures, and lands to ensure a balanced deck. Don’t forget to pay attention to your mana curve to ensure you have the right amount of early game plays as well as late-game power. And most importantly, playtest your deck regularly to see how it performs and make adjustments accordingly. Happy deck building!