Voidwomb Birthing

As an additional cost to cast Voidwomb Birthing, sacrifice any number of creatures.
You create a number of black Germ creature
tokens equal to the number of creature
sacrificed with Voidwomb Birthing. Each of those tokens are a copy of a different creature sacrificed
this way, except they get +2/+2 and are black
Germs in addition to their other colors or
types.(i.e. A 4/4 white Angel with flying would
be a 6/6 black and white Angel Germ with flying.)