Hey fellow Planeswalkers! When building a deck in Magic: The Gathering Arena, always consider your mana curve. Having a good balance of low, mid, and high-cost cards will help ensure you have plays at every stage of the game. Also, don’t forget to include cards that can deal with different threats, like creature removal or counter spells. And finally, playtest your deck to see how it performs against different matchups. Good luck and may your opening hand be full of lands!