Hey fellow Planeswalkers! When building a deck in Magic: The Gathering Arena, always start with a clear game plan. Identify your win condition and choose cards that support it. Make sure to have a good balance between spells, creatures, and other card types. Don’t forget to include removal spells and cards that can handle a variety of threats. Test your deck against different playstyles to fine-tune it. And most importantly, have fun experimenting with different strategies! May your opening hand always be favorable.