Five more cards have been teased over the weekend by CD Projekt Red! Unfortunately they have only revealed the ability of one of them so far and we're going to have to wait until tomorrow's live stream to find out about the others.
I'm not sure if it's going to be worth it adding that inferior siege engine to your deck though, what were they thinking.
Hanmarvyn's Blue Dream
Deploy: Spawn a copy of a Gold card from your opponent's Graveyard and, if it's a Unit (but not an Agent or Double Agent), Boost it by 2.