Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, always remember to consider the synergy between your cards. Focus on cards that work well together and support your overall strategy. Don’t forget about the mana curve – having a good balance of low-cost and high-cost spells is crucial for a successful deck. And lastly, always playtest your deck to see how it performs in different matchups. Happy brewing!