Whenever you cast a Phyrexian creature or artifact creature spell, incubate X, where X is that spell s mana value. (Create an Incubator token with X +1 +1 counters on it and “2: Transform this artifact.” It transforms into a 0 0 Phyrexian artifact creature.)

At the beginning of each end step, if a Phyrexian died under your control this turn, proliferate.