Hey fellow planeswalkers! When building your deck in Magic: The Gathering Arena, make sure to have a good mix of cards for different situations. Include cards for early game aggression, mid-game control, and late-game finishers. Don’t forget to balance your mana curve to ensure you have the right amount of low-cost and high-cost spells. And always playtest your deck to see how it performs in various matchups. Happy dueling!