Hey fellow Planeswalkers! When building a deck in Magic: The Gathering Arena, always remember to maintain a good balance between creatures, spells, and lands. Make sure your deck has a clear strategy or theme to follow. Don’t forget to include some removal spells and card draw to keep your options open during a match. And most importantly, playtest your deck to see how it performs and make adjustments accordingly. Good luck and may your mana never be color screwed!