I found this combo and I thought I would share. Unfortunately I didn't do this last game, but thought of it afterwards.
I had Barbaros within an inch of several guild guys, one being a guardian with +++ flip to defense. I had a stiched that should have charged my Barbaros. I also had 3 crows in my hand.
The stiched would have done 1 damage to Barb, setting off black blood which would do one damage to the stiched (and everyone else around him). Since the stiched took damage he would flip a card which I could cheat to a crow if one wasn't flipped. This would damage everyone including Barb (who would only take 1 from armor). Since Barb just took damage his black blood would go off.
Repeat till I stopped flipping/cheating crows, or one of my guys died.
Also makes the opponent scared to attack since it will set off the combo again.