Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one key strategy is to focus on synergy between your cards. Make sure each card in your deck supports the overall theme or strategy you’re going for. Don’t forget to include a good balance of creatures, spells, and other card types to keep your opponents on their toes. And always remember to playtest your deck to fine-tune it for optimal performance. Keep brewing those decks and may your opening hand always be full of mana!