Hey fellow Planeswalkers! When building your deck in Magic: The Gathering Arena, always make sure to have a good balance between spells, creatures, and lands. Don’t forget to include cards that can deal with different types of threats your opponent might play. Also, pay attention to your mana curve to ensure you have a good mix of low and high-cost cards for a smooth gameplay experience. And most importantly, never underestimate the power of card draw and removal spells in your deck. Happy dueling!