Phyrexian Incubator

Pay {g/u}, Sacrifice a creature: Draw a card.
Whenever a creature you control dies, you may
pay {p/u}{p/g}, if you do, put an egg counter on this
permanent.
At the beginning of each combat, put X 1/1
Phyrexian Germ creature tokens with infect
onto the battlefield where X is equal to the
number of egg counters on this permanent.