Wraith the Synthetic Nightmare

Indestructible Lifelink
As long as you control 5 or more creatures with
the creature type Phyrexian Wraith the Synthetic Nightmare is a creature.
{t}{x}{p/w}{p/u}{p/b}{p/r}{p/g}:Search your library for a
creature with the creature type Phyrexian and
mana cost equal to {x} revel it and put in onto the battlefield.