Huh. You weren't supposed to see those. Whoops!
So, most of our regression tests (automated tests to make sure things are working as expected) are written as, effectively, gameplay sequences - Play Runeclaw Bear, play Doom Blade targeting Runeclaw Bear, make sure it dies, etc.
These cards both provided useful effects for those test cases, so we added them to the pool of cards we could use here. They were meant to be hidden, but it looks like the settings to hide them are arriving a bit later than the cards themselves. Don't get too attached; I expect them to disappear soon.