Dabbling in those color-pie breaks to give white draw.
That being said, I would actually prefer white to get filtering for specific cards (something like akin to Abundance, with any necessary modifications to be within white's sphere) to outright draw.
I did consider making this a rare simple due to the card draw, but I think tapping five creatures on a death trigger is enough of a hoop in white, as I don't think white is known to have sac outlets.