TXT version of lists of cards
My Decks > New Deck
Actions > Bulk Import
Actions > Rename
Add variety to the lands the little purple icon and the left panel
Actions > Export to Tabletop Simulator
Actions > Download json file
Copy to
%userprofile%\Documents\My Games\Tabletop Simulator\Saves\Saved Objects
In TTS look under Saved Objects after being promoted in a game.