I've played ~30 gauntlets with this and only lost once to the sudden death boss. A little sprinkle of waxing moon into a Mother of Skies deck makes it nice and spicy, and Iadria basically wins games by itself since the AI is too stupid and only takes into account current attack values when blocking with units.
Please use responsibly.
What is the Hold'em for?
Iadria's text, deadly units from Waxing Moon, and tokens from Mother of Skies means you can almost always stall the board for five turns to blow the game open with Champion of Cunning or Harbinger.