The Activity Log allows you to track changes to your collection. This is useful for checking what happened to a missing card or for players who trade lots of cards.
To track your account activity, head to the Activity Log section of your Build page.
The Activity Log will display the following events:
when cards were added or removed, and which cards they were
when a card or card/s were tagged or had a tag removed, what the tag was and which cards were tagged/untagged