If you're on Windows and you've got cards you'd like to catalog while waiting, I wrote a PowerShell script that'll grab MH2 card data from Scryfall and pump out a CSV compatible with Deckbox (though you'll have to wait for Deckbox to add the cards to their DB before uploading!). Fill in your card counts via Excel or Google Sheets.
The Price and Foil Price columns are added for reference, you should delete them from the CSV when you're ready to upload them.