You can download this game and solo play.

[HumanAngel]

This link to download this game: https://mega.nz/file/XFpAnYbR#i3rULp7YEEvkcEsC_OAM4Q6N1sBT96PtGxLKFj0FzPQ
But, you must use SmartSteamEmu to enter the game.
1. Go search SmartSteamEmu and download it. (SmartSteamEmu 1.4.3)
2. Enter 「SSELauncher.exe.」
3. Add the game 「MagicDuels.exe」. Then in the setting enter word 316010 to 「Game App Id」. Also Select 「Inject SmartSteamEmu」and if you use x64 system, Select「Use x64 launcher」. Then Save.
4. Try Enter Magic Duels!

You can use all card. But only can solo play.