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 spells to ensure a smooth progression of plays. Also, don’t forget to include a mix of removal spells, card draw, and win conditions to increase your deck’s versatility. And most importantly, playtest your deck regularly to fine-tune its performance. Happy spell-slinging!