Omega was right, it's there for a small amount of extra damage, decreasing the amount of cards needed for the combo. It's not the main purpose of the deck, so it's not a problem if you don't draw it early, but it helps when you draw it if the opponent is not healing. It's also immune to PC, so i look at it as a constant damage factor.
However, I was wondering whether swapping it to a miracle would work better.