As mentioned in the title, when you topdeck things with the Herald overpay, it shows up as 'Card'.
Example: 21438586, line 202.
This is pretty minor, but it's a bit annoying when you're trying to look back in the game to see what happened.
Thanks for reporting this, ceviri!
The good news is that there is an easy way to get the cards listed in the log: Hit page reload (Ctrl-R on Firefox/Chrome). The bad news is that opponent can do the same, and also get the cards, which they shouldn't be able to.