Hey fellow Planeswalkers! When building your deck in Magic: The Gathering Arena, always consider your mana curve. Having a good mix of low, mid, and high-cost cards will ensure you have plays throughout the game. Also, don’t forget to include cards that can deal with a variety of threats, like removal spells or counterspells. And most importantly, playtest your deck to see how it performs and make adjustments accordingly. Good luck out there on the battlefield!