Recently Steam published the Steam Link app for Android. Here is what you need to play Magic Arena in the bathroom, bed or maybe in the bus?
- Get a MTG Arena access (its in closed beta)
- Add MTG Arana to Steam
- Install Steam for Android (on your phone)
- You are ready to stream it:
I tested it some time within my WLAN and it works great. It plays really well with fingers and on the phone. I haven't tested it on a mobile connections through some kind of VPN, but maybe will.