Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, always consider your mana curve. Having a good mix of low-cost and high-cost spells ensures you have options at every stage of the game. Don’t forget to include a balance of creatures, removal spells, and card draw to handle any situation. And most importantly, playtest your deck to see how it performs in different matchups. Keep tweaking and refining your deck to stay ahead of the competition! Good luck out there on the battlefield!