D20 changes regular pickups eg. pennies, so you can either keep that or lemon mishap. I'd go with d20, since it can be used with a blood bank to exploit the penny drops and get a bunch of other pickups and trinkets.
Also D6 is better than the D20. After all, there's that chance that a reroll might get you epic fetus (I've had it happen) which is pretty much an automatic victory.