If you want to learn more in depth about how Proton works I suggest you to ask here on [GloriousEggroll's Discord](https://discord.gg/6y3BdzC.
For emulation, X360 and PS3 needs intense resources and their emulators may be in an early development state; look back to the previous generations, maybe with a cool megabezel shader on RA.
50% of MtG products are now "Beyond Universe" cards, third-party intellectual propriety such as SpongeBob, Stranger Things, Doctor Who and more; and they are all standard legal. Here a video if you want more details: https://youtu.be/7us923DG-Gg