Hey fellow Planeswalkers! When building your deck in Magic: The Gathering Arena, always consider your mana curve. Make sure you have a good balance of low-cost and high-cost cards to ensure you can play something each turn. Also, don’t forget to include cards that can deal with various threats, such as removal spells and counterspells. And most importantly, playtest your deck against different strategies to fine-tune it for success on the battlefield! Good luck and may your opening hand always have the perfect mix of lands and spells!