Hey fellow Planeswalkers! When building a deck in Magic: The Gathering Arena, always remember to maintain a good balance between spells, creatures, and mana. Include removal spells to deal with pesky threats and don’t forget to add some card draw to keep your hand full. Also, consider the mana curve of your deck to ensure you have plays for every turn. 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!