Hey fellow Planeswalkers! When building your deck in Magic: The Gathering Arena, always remember to have a good balance of cards that support your strategy. Include a mix of creatures, spells, and other cards that work well together. Don’t forget to pay attention to your mana curve to ensure you have a good distribution of low-cost and high-cost spells. And most importantly, playtest your deck regularly to make adjustments based on how it performs. Good luck, and may your opening hand always have the perfect mana base!