This game is HUGE and constantly requires extra downloads that take up tons of space. After I downloaded the app, my brand new phone's performance absolutely tanked. All of my other apps were lagging by 10-20 seconds, including really simple things like email or my alarm clock. After some investigation, I learned that MTG Arena was constantly running in the background even when the app wasn't open, and even after restarting my phone, without permissions. Totally unacceptable. Terrible app.