Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, one key strategy is to have a clear game plan in mind. Start by identifying your win condition – whether it’s through overwhelming your opponent with creatures, milling their deck, or a powerful combo. From there, choose cards that support your win condition and work well together. Don’t forget to include some removal and card draw to keep your options open. And always remember to playtest your deck to fine-tune it for optimal performance. Happy brewing!