Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one key strategy is to focus on a clear win condition. Make sure your deck has a coherent plan to secure victory, whether it’s through overwhelming your opponent with creatures, burning them with spells, or outlasting them with control cards. Also, don’t forget to include a good mix of cards for different stages of the game, like early-game creatures for board presence and late-game bombs for that final push. And always remember to playtest your deck to fine-tune it for maximum efficiency. See you on the battlefield!