Using my limited phyrexian mana cards, I wanted to see if I could make a deck that would still function. This does not look great, and its success depends on early boosts to mana, or a lot of loss of life to get rolling. I needed three colors just to make things start to work, and I got close. The deck has a (3)/10/7/7/0/10/3 curve that averages 2.83, though that assumes not paying life in any cases.