Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one of the key tips I have is to focus on a consistent mana curve. Make sure you have a good balance of low-cost spells for early game and powerful high-cost spells for late game. Also, don’t forget to include removal spells and card draw to maintain control and keep your strategy going strong. And always playtest your deck to see how it performs in different matchups. Good luck and may your opening hand always be full of lands!