Phyrexian Cytoshaper

Creature — Phyrexian Mutant Snake3/3

When Phyrexian Cytoshaper enters the battlefield, incubate 1. Incubator tokens you control have artifact evolve. (Whenever a creature enters the battlefield under your control with greater power or toughness that the number of +1/+1 counters on that token, put a +1/+1 counter on that token.)

Not legal in Commander