Hey fellow Planeswalkers! When building a deck in Magic: The Gathering Arena, always start with a clear strategy in mind. Whether you prefer aggro, control, or combo decks, make sure all cards in your deck work towards your main goal. Don’t forget to include a good mix of creatures, removal spells, and card draw to ensure versatility. And always playtest your deck to fine-tune it based on what works best for your playstyle. Happy deck-building!