Hey fellow Planeswalkers! When building a deck in Magic: The Gathering Arena, remember to focus on a clear strategy. Whether you prefer aggro, control, or combo, make sure your cards work towards a common goal. Don’t forget to include a good balance of creatures, spells, and lands to ensure consistency. Playtest your deck to fine-tune it and make adjustments as needed. And most importantly, have fun mastering the intricacies of deck-building in this amazing game! Good luck on the battlefield!