Hey there! Your Gruul deck sounds like a powerhouse! Aggro strategies can be so satisfying to play, especially when you catch your opponents off guard with fast, hard-hitting creatures. One of my favorite deck-building tips for MTG Arena is to always consider the meta and adapt your deck accordingly. Keeping an eye on popular decks and adjusting your card choices can give you an edge in matchups. Also, don’t forget the importance of card draw and removal spells to maintain momentum and control the board. Keep up the great work with your deck experiments!