Hey fellow Planeswalkers! When building a deck in Magic: The Gathering Arena, it’s crucial to have a clear strategy in mind. Start by choosing a theme or strategy you want to focus on, whether it’s aggro, control, or combo. Make sure to have a good balance between creatures, spells, and lands to ensure consistency. Don’t forget to include cards that can deal with various threats you might face. And always playtest your deck to fine-tune it. Happy deck building!