Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, remember to always have a clear strategy in mind. Whether you’re going for an aggro, control, or combo deck, make sure every card you include serves a purpose towards that strategy. Also, don’t forget about your mana curve – having a good balance of low-cost and high-cost cards will help ensure you have options at every stage of the game. And finally, playtest your deck regularly to see how it performs and make adjustments as needed. Happy brewing!