Hey fellow Planeswalkers! When it comes to deck-building in Magic: The Gathering Arena, I always start by identifying a win condition. Whether it’s through overwhelming with creatures, controlling the board, or executing a combo, having a clear win strategy is key. Next, I focus on consistency by including multiples of key cards and enough card draw or search effects. Don’t forget to have a good balance between spells, creatures, and lands to ensure a smooth gameplay experience. And always playtest your deck to fine-tune it for maximum efficiency! Good luck out there on the digital battlefield!