Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one important tip is to have a clear strategy in mind. Whether you’re going for a fast aggro deck or a control-oriented one, make sure all your cards work towards that goal. Also, don’t forget about your mana curve – having a good balance of low-cost and high-cost spells can be key to success. Lastly, always playtest your deck and make adjustments as needed. Happy dueling!